INDEX. 



407 

 T*y 



Cirrig'^rous, supporting cirri. 



Cirrigrades\ moving by cirri. 



Cir'ripeds, or Cirripe x dia (Lat. cirrus, 

 a curl ; pes, 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, xx. 



Cla'vate (Lat. clavus, 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'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 

 fishes from the Devonian rocks, 

 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\t6g, a sheath 

 TTTtpov, a wing), the order of in- 

 sects in which the first pah* 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 

 Crinoidea. 



Comat'ula, metamorphoses of the, 

 559. 



Commis'surae (Lat. commit to, I sol- 

 der), belonging to a line or parx 

 by which other parts are con- 

 nected together. 



Compa'ges (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'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 corn- 

 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 v ceous formation, 650, 675 ; 

 fauna, 675. 



Crinoid x (Gr. icpivov, a lily ; ft'cog, 

 like), belonging to the Echino- 

 derma, which resemble lilies ; the 

 fossils called stone lilies, or encri- 

 nites, are examples, xxiii. 



Crio'ceras, a genus of the family 

 Ammonitida3. 



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

 of an animal, or processes resem- 

 bling legs. 



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

 class of articulate animals with a 

 hard skin or crust, which they 

 periodically cast, xxii. 



