700 



Index 



Contraction, 206 



of heart muscle, 173 



of smooth muscle, 116 

 Conus arteriosus, 161, 162, 164, 165 

 Convergence, 335-336 

 Convulsion, 232 

 Coot, 619, 625 

 Copepoda, 419, 506 



as secondary host, 419 

 Copperhead, 609 

 Copulation. 253, 263, 264, 351, 352 



in earthworm, 459, 460 

 Copulatory organ, 258 



sac, 407 

 Coracidium, 419 

 Coraciiformes, 625 

 Coracoid, 109 



Coral, 45, 92, 347, 386, 395, 397 

 Coral snake, 609 

 Coregonus, 588, 590 

 Corium (see Dermis) 

 Cormorant, 619. 625 

 Cornea, 215, 216, 217, 219, 502, 503 

 Corona, 439 

 Coronary artery, 166 



vein, 169 

 Corpora quadrigemina, 198, 199 

 Corpus allatum, 520 



callosum, 198. 201 



luteum, 242, 250, 260, 262, 263 



striatum, 198, 199 

 Corpuscle (see Erythrocyte or Leuco- 

 cyte) 

 Corrodentia, 538 

 Cortex, of adrenal, 235-237, 668 



of cerebrum. 197. 198 



of kidney, 187, 188 



of ovary, 242 

 Corticosterone, 236, 242 

 Cortin. 235. 236, 241 

 Cotton boll weevil, 518, 535 

 Cottus, 590 

 Cotylosauria, 601, 603, 612, 613, 614, 



626 

 Cough. 157-158 

 Cow, 46, 107, 111, 131, 132, 133, 138, 



292 

 Cow fish, 589, 590 

 Cowper's gland, 258 

 Cowrie, 476 

 Coxa, 512, 522, 523 

 Coxopodite, 495 

 Crab,_ 249, 492, 508 



as intermediate host, 414 



parasites of, 507 

 Crago, 507 

 Cramps, 232 

 Crane, 625 

 Cranial cavity, 103 



nerves, 71, 194, 204, 205 



Cranium, 101, 102, 103, 197 



of frog, 55, 56, 57 

 Crappie, 590 

 Craspedacusta, 386 

 Crayfish, 492-505 (see also Cambarus) 



chromosome number, 272 



classification, 45, 489 



commensals of, 462 



hormones, 249 



secondary host, 414 

 Creatine, 120, 186 

 Creatinine, 190 

 Creeping eruption, 434 

 Crest of birds, 241 



of ilium, 110 

 Cretaceous period, 342, 482, 569, 627, 



628 

 Cretinism, 230 

 Cricket, 538 



parasite of, 443 

 Cricket frog (see Acris), 596, 599 

 Crinoidea, 45, 544, 553-554 

 Crocodile, 46, 67, 603, 610, 611, 613, 



614 

 Crocodilia, 603, 613 

 Crocodilus, 611 

 Cro-Magnon man, 643 

 Crop, of bird, 131, 132 



of earthworm, 456 



of insect, 519, 523, 524 



of leech, 462 

 Crossing over, 313-314 

 Crossopterygii, 568, 569, 583, 591, 593, 



595 

 Crotalus, 609 

 Crown of tooth, 86 

 Crustacea, 492-508, 650 



classification, 348, 489 



endocrine system, 249 



larval stages, 508 



reproduction, 253 



respiratory system, 148 

 Cryptobranchidae. 596 

 Cryptobranchus, 596, 598 

 Cryptorchidism, 257 

 Crystalline body, 502, 503 



lens, 217, 218, 219 



style, 473 

 Ctenoid scale, 84, 583. 587 

 Ctenophora, 45, 347, 397-400, 645 

 Cuckoo, 621, 625 

 Cuculiformes, 625 

 Cucumaria, 544 

 Cud, 133 



Cumulative factor, 306 

 Curvature, cervical, 104 



greater, 132, 133 



lesser, 132, 133 



lumbar, 104 

 Cutaneous vein, 64, 66 



