I3TDEX. 



427 



Cirrig'erous, supporting cirri. 



Cirrigrades', moving by cirri. 



Cir'ripeds, or CirripeMia (Lat. cirrus, 

 a curl ; jjes, a foot), articulate 

 animals having curled jointed feet, 

 sometimes written cirrhipedia and 

 cirrhopoda. 



Classes, a subdivision of the animal 

 kingdom, xx ; again divided into 

 orders, 



Cla'vate (Lat. darns, a club), club- 

 shaped ; linear at the base, but 

 growing gradually thicker towards 

 the end. 



Clav'icle, the, or shoulder blade, 271. 



Climate, insufficient alone to ac- 

 count for the geographical dis- 

 tribution of animals and plants, 

 638641. 



Climate, the polar, its influence on 

 animals, 582. 



Climbing, 298. 



Cloa v ca (Latin, a sink], the cavity 

 common to the termination of 

 the intestinal, urinary, and gene- 

 rative tubes. 



Clyp'eiform (Lat. clypeus, a shield ; 

 forma, shape), shield-shaped, ap- 

 plied to the large prothorax in 

 beetles. 



Coal period, flora of the, 669. 



Coc'costeus, an extinct genus of I 

 fishes from the Devonian rocks, j 

 667. 



Coe'cyx, the, 258. 



Coch'lea, one of the divisions of the 

 internal ear, 154. 



Cold-blooded animals, as reptiles, 

 fishes, &c. 400. 



Coleop'tera (Gr. KO\LOQ, a sheath j 

 TTTtpov, a wing), the order of in- ; 

 sects in which the first pair of! 

 wings serves as a sheath to defend ; 

 the second pair, as the common ; 

 dor-beetle. 



Columel'la (Lat. a small column), 

 used in conchology to signify 

 the central pillar around which 

 a spiral shell is wound. 



Comat'ula, a genus of the family 

 Crinoi'dea. 



Comat'ula, metamorphoses of the, 

 559. 



Commis'surae (Lat. committo, I sol- 

 der), belonging to a line or pan 

 by which other parts are con- 

 nected together. 



Compares (Latin), a system or 

 structure of united parts. 



Con'chifers (Lat. concha, a shell ; 

 fero, I bear), shell-fish, usually re- 

 stricted to those with bivalve 

 shells. 



Cor'al rag, a stage of the oolite, 674. 



Coria x ceous (Lat. corium, hide), 

 when a part has the texture of 

 tough skin, 413. 



Cor'nea (Lat, corneus, horny), the 

 transparent horny membrane in 

 front of the eye, 123. 



Cor'neous, horny. 



Cor'neule (diminutive of cornea}, 

 applied to the minute transparent 

 segments which defend the com- 

 pound eyes of insects. 



Cor'nua (Lat. cornu, a horn), horns 

 or horn-like processes. 



Cor'puscles (diminutive of corpus, a 

 body), minute bodies. 



Cotyl'edon (Greek), a seed lobe. 



Creta'ceous (Lat. creta, chalk), be- 

 longing to chalk. 



Creta x ceous formation, 650, 675 ; 

 fauna, 675. 



Crinoid x (Gr. icpivov, a lily ; fldog, 

 like), belonging to the Echino- 

 dernia, which resemble lilies ; the 

 fossils called stone lilies, or encri- 

 nites, are examples, xxiii. 



Crio'ceras, a genus of the family 

 Ammonitidae. 



Cru'ra (Lat. crus, a leg), the legs 

 of an animal, or processes resem- 

 bling legs. 



Crusta'cea (Lat. cnista, a crust), the 

 class of articulate animals with a 

 hard skin or crust, which they 

 periodically cast, xxii. 



