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INDEX 



.Urinogenital organs, of Craniata, 110, 

 112 :' Petromyzon, 125: Myxinoids, 

 131 : Dogfish, 151, 153, 153 : Elasmo- 

 branchii, 166 : Holocephali, 179, 181 : 

 Trout, 200 : Teleostomi, 222, 223, 224 : 

 Ceratodus, 237, 238 : Frog, 266, 267 : 

 Amphibia, 287, 288 : Lizard, 310, 311 : 

 Reptilia, 336: Pigeon, 379, 380: 

 Aves, 407: Rabbit, 443, 444, 445: 

 Mammalia, 449, 551, 55,3 



Urinogenital organs, development of, 111 



Urochorda, 11 : Example, 12 : Distinctive 

 characters and classification, 18 : 

 General features, 20 : Enteric canal, 

 25 : Heart, 26 : Nervous system and 

 sense-organs, 26 : Renal organ, 26 : 

 Reproductive system, 26 : Develop- 

 ment and metamorphosis, 27 : Distribu- 

 tion, &c., 36 : Affinities, 37 



Urodieum, 368 



Urodela, 272*, 290 



Uro-hyal, 192 



Uropysjium, 351* 



Urostyle, of Satmo, 187 : Frog, 247, 249 : 

 Amphibia, 277 



Ursidw, 456, 475, 536 



Ursus, 537 



Ursus amerwanus, 515 



Ursus ferox, 514 



Use-inheritance, 622* 



Uterine crypts, 446 



Uterus See Urinogenital organs 



Uterus masculinus, 445*, 550 



Utriculus, 108* 



AGIN A, of Elasmobranchii, 166 : Rab- 

 bit, 445 : Mammalia, 552 



Valve of Thebesius, 434 



Valve, of Vieussens, 443* 



Vampire Bats, 566 



Varanus, 335 



Variation, 615* 



Vasa efferent ia, 113 



Vascular system of Balanoglossus, 3 : 

 Ascidia, 15, 16 : Urochorda, 26 : Am- 

 phioxus, 45 : Craniata, 84., 85, 88 : 

 Lamprey, 122 : Chiloscyllium, 142, 

 143 : Elasmobranchii, 164 : Holo- 

 cephali, 179 : Trout, 197 : Teleostomi, 

 222 : Ceratodus, 234, 235 : Frog, 258, 

 259, 260, 262: Amphibia, 284, 285, 

 286 : Lizard, 302 : Reptilia, 333 : 

 Pigeon, 373, 375 : Birds, 406 : Rabbit, 

 433, 436 : Mammalia, 542 



Vaso-dentine, 79* 



Vaso-ganglion, 219 See Red-glands 



Veins, Amphioxus, 45 : Craniata, 86*- 

 See Vascular system 



Velar tentacles, Amphioxus, 41 



Velum, Amphioxus, 41 



Velum interpositum, 442* 



Ventral fissure, 92* 



Ventricle See Heart 



Vermiform appendix, 433 



Vermis, of cerebellum, 442* 



Vertebra, 67* 



Vertebral column, 1 : Craniata, 66, 67 : 

 Petromyzon, 117 : Myxinoids, 130 : 

 Chiloscyllium, 136, 137 : Elasmo- 

 branchii, 158, 159 : Holocephali, 175, 

 176: Trout, 186, 187: Teleostomi, 

 213 : Ceratodus, 231 : Frog, 247, 248 : 

 Amphibia, 277, 278 : Lizard, 294 : 

 Reptilia, 319, 320 : Pigeon, 357, 358, 

 359 : Birds, 396 : Rabbit, 419 : Mam- 

 malia, 478 : Prototheria, 485 : Meta- 

 theria, 489 : Edentata, 492 : Cetacea, 

 499 : Sirenia, 502 : Ungulata, 504 : 

 Garni vora, 512 : Rodentia, 515 : Insec- 

 tivora, 517 : Chiroptera, 518 : Pri- 

 mates, 520 



Vertebral formula, 360 



Vertebral plate, 114* 



Vertebral rib See Rib 



Vertebral theory of skull, 640, 641 



Vertebrarterial canal, 419 



Vertebrarterial foramen, 358* 



Vertebrata, 37, 38 



Vesalius, 629 



Vespertilio, 458 



Vestibule, Amphioxus, 39 



Vestibule, of Rabbit, 445* 



Vexillum See Feather 



Vibrissas, 418 



Vicq d'Azyr, 635 



Villi, of embryo Mammals, 559, 561 



Vipers, 312, 330 



Virginian opossum, 466 



Visceral arch, visceral bar, visceral 

 skeleton Craniata, 70* 



Viverra, 605 



ViverridcK, 456 



Viviparous Blenny, 225 



Voles, 593 



Vomer, 73* See Skull 



Vultur, 388, 397 



Vultures, 388, 397 



Vulva of Rabbit, 418, 446 



w 



ALLABY, 467, 490, 491 

 Wallace, A. R,, 643, 644, 648 

 Wallace's line, 594 

 Walruses, 456, 475, 485, 537, 565 

 Warning characters, 620* 

 Water-lizards, 339 

 Water opossum, 466 

 Water-voles, 475 



