INDEX 



555 



dental formulae, 276-277 



dermal bones, 79, 82, 146, 147, 156 



dermal scutes, 79, 83, 147 



dentary, 156 



dentine, 79 



dermal canal system, 448 



descensus ovariorum, 392 



descenscs testiculorum, 203, 392, 



393 



Desmodus, 292 

 Desmognathns, 309, 343 

 developmental history, 15 

 development of hair, 96 

 devil-fish, 499 

 diaphragm, 316 

 diapophyses, 138, 508, 510 

 Didelphia, 36 



diencephalon, 411, 418-425, 443 

 diffuse placenta, 72 

 digestive cavity, 258, 315 

 digestive glands, 262 

 digits: names of, 177; number of, 



182 ; reduction of, 182. 

 dinosaurs, 32 

 diphyodont dentition, 280 

 dipnoans, 30, 176, 449, 453, 454, 



457, 478 



discoidal placenta, 72 

 dissepiments, 367 

 diverticula of intestine, 266 

 dog, 271, 286 

 dog-fish, 414, 415, 419, 446, 461, 



478 



dorsal fin, 164 

 dorsal nerves, 436 

 dragon-fly, 428 

 drum of ear, 493-496 

 Dryopithecus, 44 

 duck, 296 



duck-billed platypus, 33 

 duct of Cuvier, 322 

 ductns arteriosus, 331 

 ductus Botalli, 331 

 ductus Cuvieri, 322 

 ductus deferens, 377, 383, 385, 386, 



392, 393, 394, 401 

 ductus endolymphaticus, 486 

 ductus venosus Arantii, 348 

 duodenum, 266, 294 

 duplex placenta, 72 

 Duplicidentata, 37 



E 



ear, 485-497 



ear, of anthropoid, 496-497 



ear, external, 161, 496, 497 



earth-worm, 460 



ecdyses, 77 ; of epitrichium, 95 



Echidna, mammary pocket of, 114 



Echidna, 33, 288 



echinoderms, 26, 258, 536-538 



ectoderm, 60, 63, 257 



ectoturbinalia, 480 



Edentata, 37, 291 



eel, 432 



efferent nerves, 435 



eggs, 50, 51, 52, 53, 56, 57, 69, 73 



elephant, 274, 484 



enamel, 79 



endochondral ossification, 148 



endoderm, 60, 63, 257 



endolymph, 488, 492 



endolymphatic space, 357 



endolymphatic cavity, 493 



endolymphatic duct, 486 



endoskeleton, 122 



endoskeleton, parts of, 122 



endostyle, 289, 528, 531 



endoturbinalia, 480 



Enteropneusta, 260, 535, 538 



entocone, 279 



epi-hyal, 160, 284 



epidermic warts, 88, 89, 90 



epidermis, 76, 408 



epididymis, 385, 386, 394 



epiglottis, 160, 313 



epimere, 64, 65 



epimeres, 190, 245 



epimeric muscles, 190, 192 



epi-otics, 148 



epiphysis, 420, 421, 422 



episternum, 141 



epithelial bodies, 363 



epithelial corpuscles, 286 



epitrichium, 95 



eponychium, 95 



epoophoron, 391, 394 



Equus, 390 



erectile tissue, 398, 399 



Erinaceus, 402, 491 



erythrocytes, 318, 364 



ethmoid, 148 



ethmo-turbinal, 479, 480 



