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Discoveries and investigations carried on during the 19th century have thrown much light on the splendid past of Central America. The still extant ruins of great buildings, unlike anything which is known in the old world, testify to the high culture attained in pre-Columbian days by several native peoples differing greatly from one another in speech and racial affinities. As a science the archaeology of Central America has scarcely yet emerged from its infancy. Entire branches are still wholly uninvestigated. Amongst the numerous problems which await solution must still be reckoned the decipherment of the inscriptions, which hitherto has not progressed beyond the discovery of calendar systems and the relative datings involved in such systems.

For a complete survey of this ancient civilization, so far as it has been investigated, it is necessary to include with Central America, properly so called, a considerable portion of the Mexican territories south and east of the isthmus of Tehuantepec. The peoples inhabiting Yucatan, Campeche, Guatemala, Chiapas and Oaxaca present at the first view striking ethnical differences. On a linguistic basis, however, they may be united into several large groups. Thus, Yucatan and the greater part of Guatamala are inhabited by the Mayas, with whom may be included the still savage Lacantun or Lacandones. Related to these linguistically are the Tzendals in Chiapas and the Quiches and Cackchiquels in Guatemala, as well as the less important tribes of the Mam, Pokoman, Pokonchi, Tzotzil, Tzutuhil and Ixil. Between these there are patches of country in which dialects of the Mexican are spoken. In Oaxaca there is an extraordinary mixture of languages, some of which, like that of the Huave of Tehuantepec, are of quite unknown affinities; the bulk of the population, however, is composed of Mixtecs and Zapotecs with which the Mixe and Zoque on the east are connected. Mexican dialects also occur in isolated parts of Oaxaca.

Architecture

Central American architecture is characterized by a fine feeling for construction, and the execution is at once bold and aesthetically effective. Amongst the various ruins, some of which represent the remains of entire cities, while others are no more than groups of buildings or single buildings, certain types persistently recur. The commonest of such types are pyramids and galleries. The pyramids are occasionally built of brick, but most usually of hewn stone with a covering of finely-carved slabs. Staircases lead up to the top from one or more sides. Some pyramids are built in steps. Usually the platform on the top of a pyramid is occupied by buildings, the typical distribution of which is into two parts, viz. vestibule and sanctuary. In connexion with the pyramid there are various subsidiary structures, such as altars, pillars, and sacrificial stones, to meet the requirements of ritual and worship, besides habitations for officials and "tennis-courts" for the famous ball-game like that played by the Mexicans. The tennis-courts always run north and south, and all the buildings, almost without exception, have a definite orientation to particular points of the compass. Frequently the pyramids constitute one of the four sides of a quadrangular enclosure, within which are contained other pyramids, altars or other buildings of various dimensions.

The normal type of gallery is an oblong building, of which the front facing inwards to the enclosure is pierced by doors. These divide it into a series of rooms, behind which again there may be a second series. Occasionally the rooms are distributed round a central apartment, but this is ordinarily done only when a second storey has to be placed above them. The gallery-buildings may rise to as much as three storeys, the height, size and shape of the rooms being determined by the exigencies of vaulting. The principle of the true arch is unknown, so that the vaults are often of the corbelled kind, the slabs of the side-walls being made to overlap in succession until there remains only so narrow a space as may be spanned by a single flat stone. At Mitla, where the material used in the construction of the buildings was timber instead of stone, the larger rooms were furnished with stone pillars on which the beams could rest. The same principle recurs in certain ruins at Chichenitza. The tops and sides of the doors are often decorated with carved reliefs and hieroglyphs, and the entrances are sometimes supported by plain or carved columns and pilasters, of which style the serpent columns of Chichenitza afford the most striking example. On its external front one of these galleries may have a cornice and half-pillars. Above this is a plain surface of wall, then a rich frieze which generally exhibits the most elaborate ornamentation in the whole building. The subjects are geometrical designs in mosaic, serpents' heads and human masks. The corners of the wall terminate in three-quarter pillars, above which the angles of the frieze frequently show grotesque heads with noses exaggerated into trunks. The roof of the gallery is flat and occasionally gabled.

Other important sites in Yucatan are Chacmaltun, with fine wall-paintings; Tantah, with remarkable pillared facades; the ruins of Labna, Chunhuhub, and the caves of Loltun; and Xlabpak de Santa Rosa, where there is a three-storeyed temple palace. Two sculptured reliefs are of great interest; they represent a person holding a staff on which is a figure of the god Ah-bolon-tzacab.

Santa Lucia Cozumalhuapa, on the Pacific slope of the Cordilleras, is a very peculiar site. The ruins are those of a settlement which had already been deserted before Alvarado's expedition of 1522. The sculptures of gods, goddesses and other figures, executed on enormous blocks of stone, show a distinctively Mexican character, with which, however, various Mayan features are blended. They may perhaps be attributed to some offshoot of the Nahua stock, probably the Pipil Indians, which developed on lines of its own in this remote corner.

Near the frontier of Honduras are the remarkable ruins of Quirigua, which rival Copan in importance and have suffered less from the ravages of the climate. The ruins of temples and palaces contain gigantic stone stelae of very fine workmanship, on which are sculptured human and animal figures representing hieroglyphs of the calendar dates.

According to Squier the other principal ruins of Honduras are to be found in plains of the department of Comayagua, near Yarumela, near Lajamini, and in the ruined town of Cururu. They are "large, pyramidal, terraced structures, often faced with stones, conical mounds of earth and walls of stone." Further ruins, such as those of Calamulla, Jamalteca, Maniana, Guasistagua, Chapuluca and Chapulistagua, are found in the department of Comayagua in the side valleys and adjoining tablelands. The most interesting and most extensive are the ruins of Tenampua , about 20 m. south-east of Comayagua. Here ramparts, defence works, terraced stone mounds and numerous large pyramids are to be found. Squier found further ruins in the west of Honduras, which have also been described in part by Stephens, and were probably first mentioned in 1576 by Diego Garcia de Palacio .

At Rio Ulloa are remains which testify to the existence of a large population in past days. Possibly they may be identified with a site of the name of Naco mentioned by Las Casas and by Bernal Diaz .

A whole series of sites is included within the geographical limits of Chiapas, which from the archaeologist's standpoint must be considered as belonging properly to Guatemala. The country has been quite insufficiently explored.

Monte Alban is interesting for the definitely Zapotec character of its sculptures. Quiengola near Tehuantepec is a site with extensive ruins including a fine tennis court.

A characteristic feature of the extensive ruins of Zacualpa is that the pyramids and ramparts have perpendicular steps which are higher than they are broad, and this peculiarity may be attributed to the influence of the Maya tribes, who are related to the Mams of Guatemala.

Had the available material for study been confined to the manuscripts, little more progress would have been made beyond establishing subsidiary details in the actual calendar. But when a similar analysis was applied to the numerous monuments discovered and figured by Maudslay and others, some important results of a general bearing were obtained. It was found that many of the hieroglyphs of various forms upon the stones were also of numeral value, and, what was of great importance, that they all referred back to a single starting-point. This starting-point or zero is no doubt the mythological date at which, according to Mayan cosmology, the world was created. It is placed at nine or ten cycles before the time when Copan and Quirigua were erected and the picture manuscripts made. And it is by reference to it in the inscriptions that such students as Seler, Goodman and others have been enabled, as already stated, to obtain a record of the relative chronology of the most famous monuments, to confine the period of their erection within the space of a few centuries, and approximately to fix even their absolute antiquity. Though much yet remains to be done, these are substantial results which have already been won from the study of the hieroglyphs.

CENTRAL FALLS, a city of Providence county, Rhode Island, U.S.A., on the Blackstone river, about 5 m. N. of Providence. Pop. 18,167; 19,446, of whom 8792 were foreign-born, 4164 being French-Canadian, 1587 being English, and 1292 being Irish; 22,754. It is served by the New York, New Haven & Hartford railway. The Blackstone furnishes good water-power, and the chief industry of the city is the manufacture of cotton goods; other important industries are the refining of copper and the manufacture of woollens, silks and hair-cloth. The total value of the factory product in 1905 was ,090,984, being 12.9% more than in 1900. A settlement was established here about 1763 and was first a part of Smithfield, and then, after 1871, of Lincoln. About 1780 a chocolate mill was erected, and from then until 1827 the settlement was known as Chocolateville. It was incorporated as the Central Falls Fire District of Smithfield in 1847, and in 1895 was chartered as a city.

CENTRALIA, a city of Marion county, Illinois, U.S.A., in the S. part of the state, about 62 m. E. of St Louis. Pop. 4763; 6721 ; 9680. The city is served by the Chicago, Burlington & Quincy, the Illinois Central, the Illinois Southern, and the Southern railways; the first two have repair shops here. Centralia is situated in the central part of southern Illinois, popularly known as "Egypt." Among its manufactures are window glass, envelopes, cigars, concrete blocks and flour. In and near the city coal is mined, and apples, strawberries and other fruits are raised, and the city is a shipping point for coal and fruit. Centralia was first settled in 1853, and was first chartered as a city in 1859.

CENTRAL INDIA, a collection of native states in India forming a separate agency, which must not be confounded with the Central Provinces. The Central India agency was formed in 1854, when Sir R. Hamilton was appointed agent to the governor-general. It lies between 21? 24' and 26? 52' N. and between 74? 0' and 83? 0' E., and may be said to consist of two large detached tracts of country which, with Jhansi as a pivot, spread outwards east and west into the peninsula, reaching northward to within some 30 m. of Agra, and southward to the valley of the Nerbudda and the Vindhya and Satpura ranges. The total area is 78,772 sq. m. It is bounded on the N. and N.E. by the United Provinces, on the W. and S.W. by Rajputana, some native states of the Bombay presidency, and Khandesh. The Central Provinces and the Bengal district of Chota Nagpur enclose it on the S. and E., while the Jhansi district of the United Provinces separates the two tracts.

The British agent to the governor-general resides at Indore, and there are British cantonments at Mhow, Neemuch and Nowgong. The whole country is fairly provided with railways, largely at the expense of Sindhia.

Central Provinces.

The Central Provinces are divided into two parts by the Satpura range of hills , which runs south of the Nerbudda river from east to west; so that, speaking generally, it consists of districts north of the Satpuras, districts on the Satpura plateau, and districts south of the Satpuras. North of the Satpuras is the rich valley of the Nerbudda, which may be said to begin towards the north of the Jubbulpore district and to extend westward through the district of Narsinghpur as far as the western limit of Hoshangabad, a distance of nearly 300 m. The elevation of the valley above the sea varies from 1400 ft. at Jubbulpore to 1120 at Hoshangabad. In breadth it is about 30 m., extending between the Satpuras and the southern scarp of the Vindhyas. This great plain, 10,613 sq. m. in extent, contains for the most part land of extreme fertility. The continuation of the valley west of Hoshangabad forms the northern portion of the district of Nimar, the farther limit of which touches the Khandesh district of the Bombay presidency. Towards the river, though rich in parts, this tract of country is generally wild and desolate, but nearer the base of the hill range there is a large natural basin of fertile land which is highly cultivated. South of the Satpuras lies the great plain of Chhattisgarh at a mean elevation above the sea of 1000 ft.; it has an area of 23,000 sq. m., and forms the upper basin of the Mahanadi. Farther to the west and again divided off by hills is the great plain of Nagpur, extending over 24,000 sq. m. Its general surface inclines towards the south from 1000 ft. above the sea at Nagpur to 750 ft. at Chanda. To the south the province is shut in by the wide mountainous tract which stretches from the Bay of Bengal through Bastar to the Godavari, and west of that river is continued onward to the rocky ridges and plateaus of Khandesh by a succession of ranges that enclose the plain of Berar along its southern border.

Berar.

Berar consists mainly of the valley lying between the Satpura range of mountains in the north and the Ajanta range in the south. The Gawilgarh hills, a range belonging to the Satpura mountains, form the northern border. On the east the frontier is marked by the Wardha river down to its confluence with the Penganga, and on the south by the Penganga for about two-thirds of the frontier's length. The tract is half surrounded on the east, north and north-west by the Central Provinces, with which it is amalgamated. In addition to the Melghat mountain tract which walls it in on the north, Berar is divided into two sections, the Payanghat or lowland country, bounded on the north by the Gawilgarh hills, and on the south by the outer scarps of the Ajanta range, and the Balaghat or upland country above the Ajanta ridge, sloping down southwards beyond the ghats or passes which lead up to it. The Payanghat is a wide valley running up eastward between this ridge and the Gawilgarh hills, varying in breadth from 40 to 50 m., and broader towards the end than at its mouth. It contains all the best land in Berar; it is full of deep, rich, black alluvial soil, of almost inexhaustible fertility, and it undulates sufficiently to maintain a natural system of drainage, but there is nothing picturesque about this broad strip of champaign country. The upland tract, on the contrary, is diversified with low-lying plains, high plateaus, fertile bottoms and rocky wastes, and is rendered picturesque by rivers and groves.

The inscriptional records cease abruptly in the 12th century, and no more is known of the country until the rise of the Gond dynasties from the 14th to the 16th centuries. The first of these is mentioned in 1398, when Narsingh Rai, raja of Kherla, is said by Ferishta to have ruled all the hills of Gondwana. He was finally overthrown and killed by Hoshang Shah, king of Malwa. The 16th century saw the establishment of a powerful Gond kingdom by Sangram Sah, who succeeded in 1480 as the 47th of the petty Gond rajas of Garha-Mandla, and extended his dominions so as to include Saugor and Damoh on the Vindhyan plateau, Jubbulpore and Narsinghpur in the Nerbudda valley, and Seoni on the Satpura highlands. Sangram Sah died in 1530; and the break up of his dominion began with the enforced cession to the Mogul emperor by Chandra Sah of Saugor and Damoh and of that portion of his territories which afterwards formed the state of Bhopal.

About 200 years after Sangram Sah's time, Bakht Buland, the Gond chieftain of a principality seated at Deogarh in Chhindwara, having visited Delhi, set about introducing the civilization he had there admired. He founded the city of Nagpur, which his successor made his capital. The Deogarh kingdom, at its widest extent, embraced the modern districts of Betul, Chhindwara, Nagpur, with parts of Seoni, Bhandara and Balaghat. In the south of the province Chanda was the seat of another Gond dynasty, which first came into prominence in the 16th century. The three Gond principalities of Garha-Mandla, Deogarh and Chanda were nominally subject to the Mogul emperors. In addition to the acquisitions made in the north at the expense of Garha-Mandla, the Moguls, after the annexation of Berar, established governors at Paunar in Wardha and Kherla in Betul. Having thus hemmed in the Gond states, however, they made no efforts to assert any effective sovereignty over them; the Gond rajas for their part were content with practical independence within their own dominions. Under their peaceful rule their territories flourished, until the weakening of the Mogul empire and the rise of the predatory Bundela and Mahratta powers, with the organized forces of which their semi-barbarous feudal levies were unable to cope, brought misfortune upon them.

The territories in the north ceded in 1817 by the peshwa and in 1818 by Appa Sahib were in 1820 formed into the Saugor and Nerbudda Territories under an agent to the governor-general, and in 1835 were included in the newly formed North-West Provinces. In 1842, in consequence of a rising, they were again placed under the jurisdiction of an agent to the governor-general. Restored to the North-West Provinces in 1853, they were finally joined with the Nagpur province to constitute the new Central Provinces in 1861. On the 1st of October 1903 Berar also was placed under the administration of the commissioner of the Central Provinces . In 1905 the greater part of Sambalpur district, with the feudatory states of Bamra, Rairakhol, Sonpur, Patna and Kalahandi, were transferred to Bengal, while the feudatory states of Chang Bhakar, Korea, Surguja, Udaipur and Jashpur were transferred from Bengal to the Central Provinces.

During the decade 1891-1901 the Central Provinces suffered from famine more severely than any other part of India. The complete failure of the rain in the autumn of 1896 caused scarcity to develop suddenly into famine, which lasted until the end of 1897. The total number of persons in receipt of relief reached its maximum of nearly 700,000 in May 1897. The expenditure on relief alone was about a million sterling; and the total cost of the famine, including loss of revenue, amounted to nearly twice that amount. During 1897 the death-rate for the whole province rose to sixty-nine per thousand, or double the average, while the birth-rate fell to twenty-seven per thousand. The Central Provinces were stricken by another famine, yet more severe and widespread, caused by the complete failure of the rains in 1899. The maximum of persons relieved for the whole province was 1,971,000 in June 1900. In addition, about 68,000 persons were in receipt of relief in the native states. During the three years 1899-1902 the total expenditure on famine relief amounted to about four millions sterling. Berar also suffered from the famines of 1897 and 1900.

FOOTNOTE:

CENTURY , the name for a unit in the Roman army, originally amounting to one hundred men, and for one of the divisions into which the Roman people was separated for voting purposes . The word is applied to any group of one hundred, and more particularly to a period of a hundred years, and to the successive periods of a hundred years, dating before or after the birth of Christ. The "Century-plant" is a name given to the Agave , or American aloe, from the supposition that it flowered once only in every hundred years.

CEOS , an island in the Aegean Sea, belonging to the group of the Cyclades and the eparchy of Syra, 14 m. off the coast of Attica. Its greatest length is about 15 m. and its breadth about 8 m. It rises gradually towards the centre, where it culminates in Mount Elias, 1864 ft. high. Among its natural productions are lemons, citrons, olives, wine and honey; it also exports a considerable quantity of valonia. There were formerly four towns of some importance in the island:--Iulis, about 3 m. from the north-west shore; Coressia, the harbour of Iulis, with a temple of Apollo Smintheus in the neighbourhood; Carthaea, in the south-east, with a temple of Apollo; and Poie?ssa, in the south-west. Of these Iulis is represented by the town of Zea, and Carthaea by the village of 'S tais Polais; traces of the other two can still be made out. Iulis was the birthplace of the lyric poets Simonides and Bacchylides, the philosophers Prodicus and Ariston, and the physician Erasistratus; the excellence of its laws was so generally recognized that the title of Cean Laws passed into a proverb. One of them forbade a citizen to protract his life beyond sixty years. The people of Ceos fought on the Greek side at Artemisium and Salamis; they joined the Delian League and also the later Athenian alliance in 377 B.C. They revolted in 363-362, but were reduced again, and the Athenians established a monopoly of the ruddle, or red earth, which was one of the most valuable products of the island. In A.D. 1207 it was divided between four Italian adventurers; after forming part of the duchy of Naxos in 1537, it passed under Turkish rule in 1566. Silver coins of Carthaea and Coressia have been found dating from the 6th century B.C. . The present population of the island is about 4000, of which the capital has about 2000.

CEPHALIC INDEX, the term in use by anthropologists to express the percentage of breadth to length in any skull. The principle employed by Retzius is to take the longer diameter of a skull, the antero-posterior diameter, as 100; if the shorter or transverse diameter falls below 80 the skull may be classed as long , while if it exceeds 80 the skull is broad .

CEPHALONIA , an island belonging to the kingdom of Greece, and the largest of those known as the Ionian Islands, situated on the west side of the mainland, almost directly opposite the Gulf of Corinth. The name was traditionally derived from Cephalus, the Attic hero who was regarded as having colonized the island. The tradition, which is repeated by Aristotle, is probably due solely to the similarity of the names . Pop. 71,235. Its extreme length is 31 m., and its breadth varies from about 20 m. in the southern portion to 3 m. or less in the projecting part, which runs parallel with the island of Ithaca, at a distance of about 4 m. across the strait of Guiscardo or Viscaro. The whole island, with its area of 348 English sq. m., is covered with rocky hills of varying elevation, the main range running from north-west to south-east. The ancient Mount Aenos, now Elato, Monte Negro, or the Black Mountain , frequently retains the snow for several months. It is not only the loftiest part of the sierra, but also the highest land in the whole Ionian group. The name "Black" was given from the darkness of the pine woods which still constitute the most striking feature in Cephalonian scenery, although their extent has been greatly curtailed by fire. The summit is called Meg?lo Sor?s. The island is ill supplied with fresh water; there are few permanent streams except the Rakli, and springs are apt to fail in dry summers. In the western part of the island a gulf runs up from the south, a distance of about 7 m.; on its east side stands the chief town Argostoli, with about 10,000 inhabitants, and on its west side the rival city of Lixouri, with 6000. About a mile west of the town are the curious sea mills; a stream of sea water running down a chasm in the shore is made to turn the wheels. About 5 m. from Argostoli is the castle of St George, a building of Venetian origin, and the strongest fortification in the island. On an eminence east-south-east of Argostoli are the ruins of the ancient Cranii, and Lixouri is close to or upon those of Pale; while on the other side of the island are the remains of Samos on the bay of the same name, of Proni or Pronni, farther south above the vale of Rakli and its blossoming oleanders, and of an unknown city near the village of Scala. The ruins of this city include Roman baths, a brick-built temple, rock-cut tombs, and tessellated pavements; and Cranii, Proni and Samos are remarkable for stretches of Cyclopean and Hellenic walls, partly of the most irregular construction, and partly preserving almost unimpaired the results of the most perfect skill. The inhabitants of Cephalonia have all along been extremely active; and no slight amount of toil has been expended in the construction of terraces on the steep sides of the hills. Owing to the thinness of the population, however, but a small proportion of the soil is under cultivation, and the quantity of grain grown in the island is comparatively meagre. The staple is the currant, in the production of which the island surpasses Zante. The fruit is smaller than that of the Morea, and has a peculiar flavour; it finds a market mainly in Holland, Belgium and Germany. The grape vine also is grown, and the manufacture of wine is a rising industry. The olive crop is of considerable importance, and the culture of cotton in the low grounds has been successfully attempted. Manufactures are few and undeveloped, but lace from the aloe fibre, Turkey carpets and basket-work are produced by the villagers, and boats are built at both the principal towns. Of all the seven Ionian islands Cephalonia and Zante are most purely Greek, and the inhabitants display great mental activity.

In the Homeric poems Cephalonia is generally supposed to be mentioned under the name of Same, and its inhabitants, among the subjects of Ulysses, to be designated Cephallenes . In the Persian War they took but little part; in the Peloponnesian they sided with the Athenians. The town of Pale was vainly besieged by Philip of Macedon in 218 B.C., because it had supported the Aetolian cause. In 189 B.C. all the cities surrendered to the Romans, but Same afterwards revolted, and was only reduced after a siege of four months. The island was presented by Hadrian to Athens, but it appears again at a later date as "free and autonomous." After the division of the Roman empire, it continued attached to Byzantium till 1082, when it was captured by Robert Guiscard, who died, however, before he could repress the revolt of 1085. In 1204 it was assigned to Gaius, prince of Tarentum, who accepted the protection of Venice in 1215; and after 1225 it was held along with Santa Maura and Zante by a succession of five counts of the Tocco family at Naples. Formally made over to Venice in 1350 by the prince of Tarentum, it was afterwards captured by the Turks in 1479; but the Hispanico-Venetian fleet under Benedetto Pessaro and Gonsalvo of Cordova effected their expulsion in 1500, and the island continued in Venetian possession till the fall of the republic. For some time it was administered for the French government, but in 1809 it was taken by the British under Cuthbert, Lord Collingwood. Till 1813 it was in the hands of Major de Bosset, a Swiss in the British service, who displayed an industry and energy in the repression of injustice and development of civilization only outdone by the despotic vigour of Sir Charles Napier, who held the same office for the nine years from 1818 to 1827. During the British protectorate the island made undoubted advances in material prosperity, but was several times the scene of political disturbances. It retained longer than the sister islands traces of feudal influence exerted by the landed proprietors, but has been gradually becoming more democratic. Under the Venetians it was divided into eight districts, and an elaborate system of police was in force; since its annexation to Greece it has been broken up into twenty demarchies, each with its separate jurisdiction and revenues, and the police system has been abolished.

CEPHALOPODA, the fifth of the classes into which the zoological phylum Mollusca is divided . The Cephalopoda are mainly characterized by the concrescence of the foot and head. The foot grows forward on each side so as to surround the mouth, the two upgrowths meeting on the dorsal side of the head--whence the name Cephalopoda. The perioral portion of the foot is drawn out into paired arm-like processes; these may be beset with sheathed tentacles or with suckers or hooks, or both. The epipodia are expanded into a pair of muscular lobes right and left, which are bent round towards one another so that their free margins meet and constitute a short tube--the siphon or funnel. The hind-foot is either very small or absent. A distinctive feature of the Cephalopoda is their bilateral symmetry and the absence of anything like the torsion of the visceral mass seen in the Anisopleurous Gastropoda.

A shell is frequently, but not invariably, secreted on the visceral hump and mantle-skirt. The shell is usually light in substance or lightened by air-chambers in correlation with the free-swimming habits of the Cephalopoda. It may be external or internal, that is, enclosed in folds of the mantle. Very numerous minute pigmented sacs, capable of expansion and contraction, and known as chromatophores, are usually present in the integument. The sexes are separate.

The ctenidia are well developed as paired gill-plumes, serving as the efficient branchial organs ,

The vascular system is very highly developed; the heart consists of a pair of auricles and a ventricle . Branchial hearts are formed on the afferent vessels of the branchiae. It is not known to what extent the minute subdivision of the arteries extends, or whether there is a true capillary system.

Hermaphroditism is unknown in Cephalopoda; male and female individuals always being differentiated. The genital aperture and duct is sometimes single, when it is the left; sometimes the typical pair is developed right and left of the anus. The males of nearly all Cephalopoda have been shown to be characterized by a peculiar modification of the arm-like processes or lobes of the fore-foot, connected with the copulative function. The term hectocotylization is applied to this modification . Elaborate spermatophores or sperm-ropes are formed by all Cephalopoda, and very usually the female possesses special capsule-forming and nidamental glands for providing envelopes to the eggs . The egg is large, and the development is much modified by the presence of an excessive amount of food-material diffused in the protoplasm of the egg-cell. Trochosphere and veliger stages of development are consequently not recognizable.

The Cephalopoda are divisible into two orders, Tetrabranchiata and Dibranchiata, the names of which describe the number of gill-plumes present; but in fact there are several characters, of as great importance as those derived from the gills, by which the members of these two orders are separated from one another.

ORDER 1. TETRABRANCHIATA .

In the adult male nautilus we find the following important differences in the tentaculiferous disk as compared with the female . The inner inferior lobe is rudimentary, and carries no tentacles. It is represented by three groups of lamellae , which are not fully exposed in the drawing. The right and left inner lobes are subdivided each into two portions. The right shows a larger portion carrying eight tentacles, and smaller detached groups of four tentacles, of which three have their sheaths united whilst one stands alone. These four tentacles may be called the "anti-spadix." The left inner lobe shows a similar larger portion carrying eight tentacles, and a curious conical body behind it corresponding to the anti-spadix. This is the "spadix." It carries no tentacles, but is terminated by imbricated lamellae. These lamellae appear to represent the four tentacles of the anti-spadix of the right internal lobe, and are generally regarded as corresponding to that modification of the sucker-bearing arms of male Dibranchiate Siphonopods to which the name "hectocotylus" is applied. The spadix is in fact the hectocotylized portion of the fore-foot of the male nautilus. The hectocotylized arm or lobe of male Dibranchiata is connected with the process of copulation, and in the male nautilus the spadix has probably a similar significance, though it is not possible to suggest how it acts in this relation. It is important to observe that the modification of the fore-foot in the male as compared with the female nautilus is not confined to the existence of the spadix. The anti-spadix and the reduction of the inner inferior lobe are also male peculiarities. The external annular lobe in the male does not differ from that of the female; it carries nineteen tentacles on each side. The four ophthalmic tentacles are also present. Thus in the male nautilus we find altogether sixty-two tentacles, the thirty-two additional tentacles of the female being represented by lamelliform structures.

It has been maintained by some zoologists that the Ammonoidea were Dibranchiate, though it would not follow from this that the shell was, therefore, internal. They are, however, generally classed with the Tetrabranchiata, and the absence of all evidence of the possession of an ink-sac is in favour of this view. There can be little doubt that they gave rise to the Dibranchiata.

ORDER 2. DIBRANCHIATA

In the oviduct is a glandular enlargement, and in addition to this the females are provided with the so-called nidamental glands which are developed on the somatic wall of the pallial cavity, one on each side of the rectum, except in certain Oigopsida and in the Octopoda, in which these organs are absent. The latter fact is related to the habit of the majority of the Octopoda of guarding or "incubating" their eggs, which have little protective covering. In the other cases the eggs are surrounded by a tough gelatinous elastic material secreted by the nidamental glands.

The mesoderm also originates at the anal side of the ectoderm and extends in two bands right and left between ectoderm and endoderm. After the mesoderm is thus established, a little vesicle lying upon and open to the yolk is formed from the endoderm, and this vesicle ultimately gives rise to the stomach, the two lobes of the liver and the intestine. The buccal mass and oesophagus arise from a stomodaeal invagination, and the anus is formed later from a short proctodaeal invagination.

The coelomic cavity appears as a symmetrical pair of spaces in the mesoderm, right and left of the intestine, and from it grow out the genital ducts and the renal organs. The gonad develops from the wall of the coelom.

SUBORDER 1. DECAPODA.--Four pairs of ordinary non-retractile arms which are shorter than the body, and one pair of tentacular arms, situated between the third and fourth normal arms on each side and retractile within special pouches. Suckers pedunculated and provided with horny rings, on the tentacular arms confined usually to the distal extremities. Usually a well-developed internal shell, and lateral fins on the edges of the body. Heart in a coelomic cavity; nidamentary glands usually present.

SUBORDER 2. OCTOPODA.--Only four pairs of arms, all similar and longer than the body. Body short and rounded aborally. Suckers sessile. Heart not contained in coelom. No nidamentary glands.

CEPHISODOTUS, the name of the father and of the son of Praxiteles, both sculptors like himself. The former must have flourished about 400 B.C. A noted work of his was Peace bearing the infant Wealth, of which a copy exists at Munich. Peace is a Madonna-like figure of a somewhat conservative type; the child Wealth is less successful. Cephisodotus also made, like his son, a figure of Hermes carrying the child Dionysus, unless indeed ancient critics have made two works of one. He made certain statues for the city of Megalopolis, founded in 370 B.C. Of the work of the younger Cephisodotus, his grandson, we have no remains; he was a prolific sculptor of the latter part of the 4th century B.C., especially noted for portraits, of Menander, of the orator Lycurgus, and others .

CERAM , an island of the Dutch East Indies, in the Molucca group, lying about 3? S., and between 127? 45' and 131? E. Its length is a little over 200 m., its greatest breadth about 50 m., and its area, including neighbouring islets, 6621 sq. m. It consists of two parts, Great Ceram and Little Ceram or Huvamohel, united by the isthmus of Taruno; and, for administrative purposes, is assigned to the residency of Amboyna, being divided into Kairatu or West Ceram, Wahai and Amahai, the northern and the southern parts of Middle Ceram, and Waru or Eastern Ceram. No central chain of mountains stretches west and east through the island, but near the north coast hills, rising 2300 to 2600 ft., slope steeply to the shore. Near the south coast, west of the Bay of Elpaputeh, a complex mass of mountains forms a colossal pyramid, with peaks rising to nearly 5000 ft. The isthmus connecting the two parts of the island is very narrow, and has a height of only 460 to 490 ft. The chief rivers flow north and south into bays, but are navigable only for a few miles during the rainy season. The rainfall is very heavy, amounting to 121 in. on the south coast. On the north coast the bays of Savai and Waru are accessible for small vessels. The geological structure, consisting chiefly of eruptive rocks and crystalline limestone, is similar to that of northern Amboyna. In the eastern section the prevailing rock is crystalline chalk, similar to that of Buru. Several hot springs occur, and earthquakes are not infrequent. About 4000 persons perished in the earthquake of 1899. A large part of the interior is covered with dense forests, and except along the coast the population is scanty. For the naturalist Ceram is without much interest, lacking characteristic species or abundance of specimens. The Bandanese pay occasional visits to shoot bears and deer; there are numbers of wild goats and cattle; and among birds are mentioned cassowaries, cockatoos, birds of paradise, and the swallows that furnish edible nests. A large number of fish are to be found in the various rivers; and as early as 1860 no fewer than 213 species were described. The most valuable timber tree is the iron-wood. Rice, maize, cocoa-nuts, sugar-cane and a variety of fruits are grown; and some tobacco is exported to Europe; but by far the most important production is the sago palm, which grows abundantly in the swampy districts, especially of Eastern Ceram, and furnishes a vast supply of food, not only to Ceram itself, but to other islands to the east. The Dutch have established cocoa and coffee plantations at various points. The coast-villages are inhabited by a mixed Malay population, Buginese, Macassars, Balinese and other races of the archipelago. The interior is occupied by the aborigines, a people of Papuan stock. They are savages and head-hunters. The introduction of Christianity was hampered by the baneful influence of a secret society called the Kakian Union, to which pagans, Mahommedans and Christians indiscriminately attached themselves; and it has several times cost the Dutch authorities considerable efforts to frustrate their machinations . The total population is estimated at 100,000, including 12,000 Christians and 16,000 Mahommedans. The chief settlements are Savai at the north and Elpaputeh at the south end of the isthmus of Taruno. There was a Dutch fort at Kambello, on the west side of Little Ceram, as early as 1646.

CERAMICS, or KERAMICS , a general term for the study of the art of pottery. It is adopted for this purpose both in French and in German , and thus has its convenience in English as representing an international form of description for a study which owes much to the art experts of all nations, though "ceramic" and "ceramics" do not appear in English as technical terms till the middle of the 19th century.

The word "pottery" in its widest sense includes all objects fashioned from clay and then hardened by fire, though there is a growing tendency to restrict the word to the commoner articles of this great class and to apply the word "porcelain" to all the finer varieties. This tendency is to be deprecated, as it is founded on a misconception; the word "porcelain" should only be applied to certain well-marked varieties of pottery. The very existence of pottery is dependent on two important natural properties of that great and widespread group of rocky or earthy substances known as clays, viz. the property of plasticity , and the property of being converted when fired into one of the most indestructible of ordinary things.

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