INDEX-GLOSSARY. 369 



Corpus restiforme, in the Rabbit A projection situated on either side of 



the roof of the fourth ventricle, 302. 

 Corpus spongiosum, in Mammalia A mass of vascular tissue making up 



the dorsal part of the penis, and traversed by the urinogenital canal, 



298. 

 Corpus striatum, in the fore-brain A mass of grey matter projecting into 



the front part of either lateral ventricle, 210, 253, 301. 

 Corpus trapezoideum, in the Rabbit A rectangular area situated ventrally 



and anteriorly on either side of the medulla oblongata, 302, 338. 

 Corpuscles Blood c., 59, 78, 161, 195, 245, 289, 293; Central c. (centro- 



soma), 73; Colourless c., 161 ; Muscle c., 208, 291, 300 ; Red c., 161; 



Touch c., 178, 218, 254, 271, 303. 

 Cortex, of kidney, 295 ; of brain, 333. 

 Corti, Organ of, 304. 

 Coverts Wing c., 229 ; Tail c., 229. 

 Cranio-facial angle, 272, 339. 

 Craniota, 135. 



Cranium ( K paviov, the skull) The brain-case, 179, 232, 271, 323. 

 Cranium Primordial. See Chondrocranium. 

 Crayfish = Astacus, q.v. 

 Crista acustica A projection in the ampulla of a semicircular canal, upon 



which is a patch of auditory epithelium, 221. 

 Croll, 349. 



Crop Part of the mid-gut serving for the storage of food, 57, 58, 242. 

 Cross, 4. 

 Crura cerebri Two longitudinal masses of nerve-fibres on the floor of the 



mid-brain, 211, 253, 302. 

 Crus (crus, a leg), in Vertebrates The part of the leg between thigh and 



ankle. See Hind limb. 

 Crustacea, 86. 

 Crystal cone, 104. 

 Crystalline style, 114. 

 Ctenidium (dim. of XTS/J, *Tyy, a comb) The gill of Molluscs, typically 



plume-like, 112. 

 Cuba, 349. 

 Cuticle (cuticula, dim. from cutis, skin) A structureless membrane 



covering the epidermis, 13, 28, 29, 48, 55, 76, 312. 

 Cyclas, 121. 

 Cyclostomata, 153. 

 Cyst A protective case in which some animals are enclosed during a 



dormant stage, 9, 14. 

 Cysticercus, 44, 46. 



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