5io REPTILES, AMPHIBIANS AND FISHES 



Viper a ammodytes, 86. 



— macrops, 145. 

 Viperidae, distribution, 43. 



— fangs, 144. 



— viviparity, 68. 

 Viviparity, Elasmobranchs, 315. 



— Teleostei, 331. 



— reptiles, 67. 



Vocal sacs of Anura, 22g. 

 Voice of fishes, 403. 



— of reptiles, 63. 



Wagler's viper, 81. 



Wall-lizard, 76, 77. 



Warning coloration, in Amphibia, 221. 



— in reptiles, 88. 

 Water-monitor, 34. 

 Webbed feet of Anura, 223. 

 Weberian ossicles, 393. 

 Whales compared with fishes, 232. 

 Whip-snakes, 86. 



Woodland, Dr., on oxygen of air- 

 bladder, 390. 

 Wood-snakes, 85, 86. 



Worthington, Julia, on habits of Myx- 

 inoids, 443, 444. 



— on variations in gills of same, 446. 

 Wrasses, 273. 



Wyman, Dr., on gestation of Anableps, 



335- 



— on mouth gestation, 330. 



Xenodermichthys, luminous organs, 



416, 428. 

 Xenopus, 167. 



— tentacles of larva, 212. 

 Xenosauridas, 118. 



Xochimilco, Lake, conditions of, 218. 



Yves Delage, on Leptocephalus, 351. 



Zenneck, on hearing in fishes, 392. 

 Zoarces viviparus, 333, 338. 

 Zoarcidae, 331, 418. 

 Zonuridae, 41, 118. 

 Zygantra, 131. 

 Zygosphenes, 130. 



