COT 



C K A 



CORY'PHODON. (from Kopvfirj, a point, 

 and oove, a tooth, Gr.) The name 

 assigned by Prof. Owen to a sub- 

 genus of extinct fossil tapiroid, 

 one species of which, Coryphodon 

 Eocgenus, has been discovered in 

 the eocene clay, on the coast of 

 Essex. 



COSMACANTHTJS MALCOLMSONI. A fossil 



fish of the old red sandstone, de- 

 scribed by Agassiz in his Poissom 

 Fossiles. 



COSMO'GONY. (/coo-^or/eVem, Gr. cosmo- 

 gonie, Fr.) The science of the 

 formation of the universe. 



COSMO'GRAPHER. (from cosmographe, 

 Er. cosmografo, It. /coV/toe and<y/>a0w, 

 K0ff/u,orypd(fios, Gr.) One who de- 

 scribes the several parts of the 

 creation by writing. 



COSMO'GRAPHY. (cosmographie, Er. 

 cosmogrcifia, It. Koafjio^pa^la, Gr.) 

 The science which describes the 

 several parts of the creation, de- 

 lineating them according to their 

 number, positions, motions, magni- 

 tudes, figures, &c. 



COSMOLO'GICAL. (cosmologique, Fr. 

 Koa^oKo^iKos, Gr.) Pertaining to 

 the science of cosmology. 



COSMO'LOGIST. A pursuer of the science 

 of cosmology; one who describes 

 the several parts of creation. 



COSMO'LOGY. (cosmologie, Er. icofffio- 

 Xory/a, Gr.) The science which 

 treats of the general laws by which 

 the physical world is governed; 

 the study of the world in general. 



CO'STA. (costa, Lat. plural costse.) 

 A rib. 



CO'STAL. (costal, costale, Er.) Belong- 

 ing to the ribs. 



CO'STATE. | (from costatus, Lat.) 



CO'BTATED. ) Bibbed, or having 

 ribs. 



CO'TTLE. (from Korv\rj, Gr. cotyl, Er. 

 cwoiti (Pun os dans laquelle un autre 

 08 s'artieule.) The cavity or socket 

 of a bone which receives another 

 bone in articulation, as the socket 

 of the hip which receives the head 

 of the femur, or thigh-bone. 



CoTYLE / D03f . (KOTv\t]^iav , Gr. cotyledon, 

 Er.) The side lobe, or seed-lobe of 

 seeds, furnishing nourishment and 

 protection to the corculum, and 

 forming the chief bulk of the seeds: 

 these lobes swell and expand in the 

 ground, and as the stem ascends 

 they are usually raised out of the 

 ground, assume a green colour, and 

 perform the functions of leaves until 

 the young leaves unfold, when they 

 generally wither. The cotyledon 

 is found at the point of union of 

 the radicle and plumule. The 

 most essential difference in the 

 structure, mode of growth, and 

 character of the plants growing 

 from the seeds, is found connected 

 with the number or position of the 

 cotyledons. Those plants, the seeds 

 of which have only one cotyledon, 

 or if more, these alternate on the 

 embryo, are called monocotyledo- 

 nous. All monocotyledonous plants 

 can be recognized without any 

 difficulty, by a characteristic feature 

 of the leaf, the veins of the leaf 

 being parallel, and not reticulated ; 

 all the palms, the tulip, lily, aloe, 

 &c., are instances. Those plants 

 which have two cotyledons, and 

 those opposite, are called dicotyle- 

 donous; all dicotyledonous plants 

 have the veins of their leaves 

 reticulated. 



COTYLE'DONOTTS. Having cotyledons. 



COT/ZERANITE. A mineral so named 

 by Leonhard from its having been 

 found in the country called des 

 Couzerans. 



CO'WBY. The common or familiar 

 name for shells belonging to the 

 genus Cypr&a. 



CRAG. A tertiary deposit of the 

 older pliocene period, which has 

 obtained this name from a provin- 

 cial term signifying gravel. The 

 crag is chiefly developed in the 

 eastern parts of Norfolk and 

 Suffolk, extending thence into 

 Essex ; it is seen to rest on the 

 chalk and on the London clay, but 



