438 



INDEX. 



Tutidanus, 283, 

 Twixt brain, 49. 

 Tylopoda, 396, 398. 

 Tylosurus, 257. 

 Tympanic bone, 357. 

 Tympanum , 73. 

 Typhline, 320. 

 Typhlogobius, 263. 

 Typhlonectes, 288. 

 Typhlops, 326. 

 Typotherium, 402. 

 Typothrax, 328. 

 Tyrannus, 351. 

 Tyrant bird, 351. 



Uintatherium, 400. 



Ulna, 176. 

 Ulnar artery, 189. 

 Ulnare, 176. 

 Umbilicus, 288. 

 Umbra, 257. 

 Umbridse, 257. 

 Unciforme, 177. 

 Uncinate process, 146. 

 Ungulata, 391. 

 Ungulata Vera, 392. 

 Unguligrade, 361. 

 Unicom fish, 266. 

 Unipolar nerve cells, 10. 

 Upeneus, 261, 

 Upupa, 348. 

 Ur, 400. 

 Uranidea, 259. 

 Uranoscopus, 261. 

 Ureter, 122. 

 Urethra, 124. 

 Una, 349. 

 Urinator, 349. 

 Urochordia, a, 

 Urodela, 284. 

 Urogenital ducts, 126. 

 Urogenital organs, 116. 

 Urogenital sinus, 130. 

 Urohyal, 335. 

 Uropeltes, 326. 

 Urostyle, 142. 

 Urotrichus, 385. 

 Ursidae, 412. 

 Ursus, 412. 

 Uterine placenta, 374. 

 Uterus, 127. 



Uterus masculinus, 128. 

 Utriculus, 70. 



Vagina, 127. 

 Vagus nerve, 63. 

 Valve, ileocolic, 36. 

 Valve, spiral, 36. 

 Valve of Vieussens, 54. 

 Valvulse conniventes, 38. 

 Vampyre bat, 388. 

 Vampynis, 388. 

 Varanidse, 320. 

 Varanus, 320. 

 Vas aberrans, 130. 

 Vas deferens, 130. 

 Vas efferens, 130. 

 Vater*s corpuscles, 69. 

 Veins, 178, 192. 

 Velum, 220. 

 Vena cava, 195, 

 Venous blood, 184. 

 Ventral aorta, 181. 

 Ventral fins, 231. 

 Ventral limb, 167. 

 Ventral nerve roots, 46. 

 Ventricles of brain, 49. 

 Ventricle, fifth, 57. 

 Ventricle of heart, 181. 

 Ventricle of larynx, 29. 

 Vermiform appendix, 39, 

 Vermis, 54. 

 Vermilingua, 383. 

 Vertebras, 135, 

 Vertebral artery, 188. 

 Vertebral bow, 137. 

 Vertebral column, 134. 

 Vertebrarterial canal, 145. 

 Vertebrata, 218. 

 Vertebrates, origin of, 215. 

 Vesicles of Savi, 68. 

 Vesperugo, 387. 

 Vespertilio, 387. 

 Vespertilionidae, 387. 

 Vibrissas, 69, 98. 

 Vicuna, 398, 

 Villi, 38. 

 Viper, 325. 

 Vipera, 325. 

 Viperidae, 325. 

 Visceral clefts, 22. 

 Visceral nerves, 64. 

 Visceral skeleton, 150, 154. 

 Visual organs, 78. 

 Vitelline membrane, 207. 

 Vitelline veins, 192. 

 Vitreous humor, 79. 

 Vivera, 41a. 



Viveridas, 412. 

 Vizcacha, 391. 

 Vocal cords, 29. 

 Vole, 390. 



Voluntary muscle, 12. 

 Vomer, 163. 

 Vomer (fish), 263. 

 Vulpes, 412. 

 Vultures, 348. 



Wagner's corpuscles, 69. 



Wallaby, 380. 



Walrus, 413. 



Wart-hog, 397, 



Weak fish, 259. 



Weasel, 412. 



Weberian apparatus, 26, 



255- 

 Wee vers, 261. 

 Whales, 405. 

 Whale-bone whales, 409, 

 White of egg, 207. 

 White matter, 11. 

 White fish, 256. 

 White tissue, 13. 

 White whale, 40S. 

 Window pane, 265. 

 Wing coverts, 330, 

 Wirsung's duct, 40. 

 Wish-bone, 336, 

 Wolf, 412. 

 Wolffian body, 116. 

 Wolffian duct, 119, 126. 

 Wolf fish, 261. 

 Wolverine, 412, 

 Woodchuck, 390, 

 Woodpecker, 351. 

 Wrasse, 260. 

 Wryneck, 351, 



Xenarchi, 259. 

 Xenarthra, 382. 

 Xenopterygii, 260. 

 Xenunis, 383. 

 Xenopus, 286. 

 Xerobates, 311. 

 Xiphactinus, 256. 

 Xiphias, 263. 

 Xiphiidae, 263. 

 Xiphistemum, 148, 

 Xiphodon, 398. 

 Xiphiplastron, 308, 



