366 APPENDIX III 



COELOM (G. koilos, a cavity), the cavity formed between the somatopleure 



and splanchnopleure of the hypomere; the body cavity. 

 COMMA (G. to cut off), a suffix referring to a dividing sheath; myocomma, 

 CONDYLUS (L. knuckle), a condyle or projection. 

 CONJUNCTIVA (L. conjunctus, to join together), the ectodermal epithelium 



connecting the outer covering of the eyelids with the covering of 



the cornea. 

 CORACOID (G. korakoeides, Hke a crow's beak), particularly the ventral pair 



of bones in the pectoral girdle, lost in the higher mammals except 



for the coracoid process of the scapula. 

 CORIUM (L. leather), the dermal portion of the skin. 

 CORNEA (L. corncus, horny), the outer coat of the eyeball, derived from 



ectoderm and mesoderm. 

 coRNUA (L. horn); as, cornu (horn) of hyoid or uterus; as adjective, 



cornuate. 

 CORPUS (L. body), corpora, plural; corpora quadrigemina, corpus luteum. 

 CORPUS LUTEUM (L. corpus, plus luteo, yellow), cellular bodies formed on 



the ovaries after the rupture of a follicle. 

 CORTEX (L. bark); anatomically, the outer portion; cerebral, renal, or 



adrenal cortex. 

 COSTA (L. rib) ; costal cartilages, intercostal spaces. 

 CRANIAL (G. kranion, skull), the skull, specifically the brain case or cal- 



varium; cranial nerves. As a noun, cranium. 

 Cretaceous (L. creta, chalk), the most recent period of the Mesozoic Era. 



following the Jurassic; described first in the chalk measures of 



England. 

 cretin (F. cretin, an idiot), a type of infantilism, partially corrected by 



thyroid feeding. 

 cribriform (L. cribrum, a sieve), the sieve-like ethmoid plate through 



which the olfactory nerves pass. 

 Crocodilia (G. krokodeilos, crocodile), an order of diapsid reptiles in- 

 cluding the crocodile, alligator, cayman and gavial. 

 Cro-Magnon (towm in France), a race of recent men (Homo sapiens), 



the cave dwellers of France and Spain. 

 CROssoi (G. fringe), a combining form. 

 Crossopterygii (G. crossoi, plus ptcron, a wing or fin), an order of bony 



fishes from which the amphibia evolved. 

 crypto (G. hidden), cryptorchid, Cryptobranchus. 

 Cryptobranchus (G. kryptos, hidden, plus bronchia, gills), a genus of 



American amphibia; the largest living amphibian (of Japan) is 



sometimes included in the same genus. 

 cutis (L. skin) ; cutaneous, of or pertaining to the skin. 

 CYCLOS (G. a circle), a combining form; cycloid, cyclostome. 

 Cyclostomata (G. kyklos, round, plus stoma, mouth), a class of verte- 

 brates lacking jaws; the most primitive vertebrates. 

 Cynognathus (G. kynikos, doglike, plus gnathos, jaw), a genus of ex- 

 tinct therapsid, or mammal-like, reptiles. 

 cyst (G. kijstis, a bladder), a membranous sac or vesicle; the cystic lobe 



of the liver. 

 CYTO (G. kytos, a hollow space), a combining form; eytology. leucocyte. 



dactyl (G. daktylos, a finger), a combining form; pterodactyl, brachy- 

 dactyl. 



