INDEX 



Distribution, of Acrania, 62 



Distribution, geographical, 598 : of 

 Cephalodiscus, 13 : Rhabdopleura, 

 13 : Urochorda, 41 : Cyclostomata, 

 139: Holocephali, 182: Teleostomi, 

 235 : Dipnoi, 250 : Amphibia, 302 : 

 Reptilia, 358, 359 : Aves, 429 : 

 Mammalia, 579 



Distribution, geological, 618 : of Cyclo- 

 stomata, 139 : Elasmobranchii, 182 : 

 Holocephali, 190 : Teleostomi, 236, 

 237 : Dipnoi, 252 : Amphibia, 302 : 

 Reptilia, 359, 360 : Aves, 430 : 

 Mammals, 581 



Divers, 402, 431 



Diverticulum, cesophageal, of Balano- 

 glossus, 4, 6 



Dodo, 404, 413, 417, 431, 622 



Dogfish, 68 See Scyllium and Hemi- 

 scy Ilium 



Dogfishes, 165-182 



Dogs, 470, 491, 499, 529, 530, 543, 

 551, 552, 559, 580 



Dohrn, Anton, 663 



Dolchinia, 22 



Doliolidce, 22 



Doliolum, 22, 25, 26, 28, 29, 30, 37, 

 38, 39, 41 



Dolphins, 466, 486, 543, 544 



Dominant characters, 644, 645 



Dorsal aorta, 89 See Vascular system 



Dorsal fissure, 95, 96* 



Dorsal lamina, 17, 18 



Dorsal root, of spinal nerve, 96*, 101 



Dorsal shield, Pteraspis, 254 



Dorsal tubercle, of Ascidia, 19, 20 



Doves, 404 



Down feathers, 369, 371*, 372, 409 



Draco, 335, 355, 357, 617 



Draco volans, 335, 355, 617 



DrepanaspidcB, 254, 255* 



Drepanaspis gemundenensis, 254 



Drepanidce, 612 



Dromseognathous arrangement, 414* 



Dromceus, 398, 408, 409, 413, 417, 419, 

 429 



Dromatherium, 581 



Dryopithecus, 590 



Dryornis, 401 



Duck-Bill, 464 See Ornithorhynchus 



Ducks, 403, 408, 415, 416 



Ductless glands of Craniata, 85, 117 



Ductus Botalli, 296, 298* 



Ductus Cuvieri, 152* 



Ductus endolymphaticus, 322 



Dugong, 467, 496, 501, 518, 519, 550, 

 551, 579, 586 



Dujardin, 658 



Dumb-bell-shaped bone, 502, 505* 



Duodenum, 149* : of Pigeon, 384, 385 : 

 Rabbit, 447, 448 



Duplicidentata, 474 



Dura mater, 100* 



E 



E 



I AULE-RAYS, 172 



Eagles, 403, 415, 423 



Ear, of Craniata, 110, 111, 112: of 

 Lamprey, 130 : Myxine, 137 : Dog- 

 fish, 158 : Elasmobranchii, 174 : 

 Trout, 208, 209 : Frog, 277, 278 : 

 Lizard, 321 : Reptilia, 350 : Pigeon, 

 369, 394 : Aves, 422 : Rabbit, 436, 

 459 : Mammals, 563, 564 



Eared Seals, 470, 491, 580 



Earless Seals, 470--See Phocidse 



Ecdysis, 332 



Echeneis, 219 



Echidna, 464, 476, 477, 478, 479, 503, 

 504, 505, 541, 545, 554, 558, 560, 

 561, 562, 578 



Echidna aculeata, 477, 479, 504, 554, 

 560, 561 



Ectocuneiform, 444 See Limb-skele- 

 ton 



Ecto-ethmoids, of Craniata, 77, 78* 

 See Skull 



Ectopterygoid, 308, 309 



Edentata, 465*, 508-513, 541, 557, 565, 

 567, 579, 584, 585 



Edestosaurus, 366 



Eels, 190, 214, 218, 221, 230, 232, 233, 

 235, 236 



Efferent branchial arteries of Amphi- 

 oxus, 49, 50* See Vascular System, 

 89 



Efts, 284, 287 



Egg See Development 



Egg-shell, of Dogfish, 161 : Elasmo- 

 branchs, 175, 176 : Holocephali, 

 190 : Reptiles, 357 : Birds, 422 : 

 Prototheria, 569 



Ehrenberg, 661, 665 



Elaeoblast, 41 



Elasmobranchii, 64*, 140* : Example, 

 140 : Distinctive characters and 

 classification, 161 : External char- 

 acters, 165 : Integument, 166 : 

 Skeleton, 167 : Skull, 168 : Muscles, 



171 : Electric organs, 171 : Lumin- 

 ous organs, 171 : Digestive system, 



172 : Respiratory organs, 173 : 

 Blood system, 173 : Brain, 173 : 

 Organs of sense, 174 : Urinogenital 

 organs, 174 : Development, 17d : 

 Ethology and distribution, 181 



Elastin, 146* 

 Electric Catfish, 226 

 Electric Eel, 226 

 Electric lobe, 171, 174* 



