402 



INDEX 



U 



ulna, 290 



Ungulata, 220 



urea, 278 



ureter, 277, 278 



urinary tubules, 7, 8, 277, 278 



Urodeles, 169 



Ursus americanus, 18 



Ursus arctos, 18 



Ursus horribilis, 18, 224 



vaccination, 328 

 vagus nerve, 300 

 valves of heart, 7, 88, 262 



of shell, 98 



of veins, 265 

 variation, 356, 372 

 varieties, 17, 356-359 

 veins, 5, 262-266 

 ventricles, 100, 262 

 vermiform appendix, 250, 344, 345 

 vertebrae, 160, 289, 290 

 vertebral column, 160, 289 

 Vertebrates, 153-157 

 viceroy butterfly, 23 

 villi, 250 



visceral ganglia, 100 

 vision, 3, 307, 308 

 vitreous humor, 307 

 vocal sacs, 171 

 Volvox, 332, 333 

 vultures, 202 



W 



walking-stick, 16 



Wallace, A. R., 358 



walruses, 224 



warble flies, 43 



warning colors, 170, 364 



wasps, 56, 64, 65 



water fleas, 97 



water moccasin, 179 



water scorpion, 33 



water striders, 34 



wax glands, 60 



wax pincers, 59 



web, 77-80 



weevils, 55 



Weismann, A., 370 



whalebone, 226 



whales, 225, 226, 346 



Whetham, 385 



whirling beetles, 54 



White, A. D., 315 



white corpuscles, see Leucocytes 



Wiedersheim, R., 346 



windpipe, 272 



winking, 299 



wolves, 223 



worker bees, 56-62 



worms, 114-121 



wrigglers, 45-48 



yellow fever, 48 

 yellow jackets, 65 



