INDEX. 



437 



Vertebrata, 290 

 Villi, 307 

 Vinegar-eels, 182 

 Visceral ganglion, 196 

 Visceral skeleton, 290, 293 

 Vital force, 139 

 Vitreous humor, 304 

 Vocal chords, 61 

 Vomer, 39 

 Vorticella, 151 

 Vultures, 360 



Walking-stick, 245 

 Walrus, 390 

 Wasp, study of, 87 

 Wasps, 255 

 Water-beetles, 251 

 Water-skaters, 258 

 Wuter-snakes, 348 

 Water vascular system, 117 

 Weasels, 388 



Weevils, 250 



Whalebone, 380 



Whales, 378 



White ants, 247 



Whitefish, 328 



White Mountain butterfly, 267 



Wickersheimer's fluid, 6 



Windpipe, 309 



Wing coverts, 49 



Wireworms, 252 



Wishbone, 51, 297, 354 



Wolffian bodies, 18 



Wolves, 388 



Wombat, 371 



Woodchuck, 376 



Woodpeckers, 361 



Worms, 178 



Wrens, 363 



Xiphisternum, 37 

 Zooid, 123, 164 



