INDEX. 



547 



Unconsciousness, 494, 507. 



Uinta, 147. 



Uintatherium, 354. 



Uintatheriidae, 318. 



Uma, 73. 



Unguiculata, 140, 143, 374. 



Ungulata, 138, 140, 142, 143, 147, 205, 

 248, 295, 297, 302, 321, 330, 340, 353, 

 355. 357. 361, 374, 39°; origin of, 209. 



Unionidae, 203. 



United States, 49, 53, 315. 



Urochorda, 82. 



Urodela, 109, no, 172. 



Uropeltidae, 123. 



Uroplates, 88. 



Ursits arcios, 21, 22 ; i'. maritivtus, 21. 



Unspecialized, doctrine of, 173. 



Use and disuse, doctrine of, 9. 



Vandellia, 103. 



Vanessa io, 232 ; V. urticae, 232. 



Variation, 21. 



Variation, of basal lobes of leaves, 

 5; causes of, 225; in cicindela, 25; 

 cnemidophorus, 41 ; embryogenic, 

 444 ; fortuitous, 444 ; gamogenic, 

 444; geographical, 47; gonagenic, 

 444 ; in North American birds and 

 mammals, 45 ; origin of, 225, 497 ; 

 ontogenetic, 444 ; in Osceola cioliaia, 

 29; phylogenetic, 444. 



Variations, of specific characters, 25 ; 

 somatogenic, 444 ; structural char- 

 acter, 58. 



Varigny, 229. 



Vermes, 80, 81, 82, 83, 172, 263, 268, 

 368, 437. 



Vertebral centra, forms of, 302. 



Vertebrata, brain and nervous sys- 

 tem of, 94, 139 ; classification of, 



93 ; circulating system of, 93, 192. 



origin of, 81 ; phylogeny of, 81. 

 Vestinautilus, 186. 

 Vilmorin, 228. 



Virchow, Prof., 159. 169, 467. 

 Vise, 416. 

 Vola, 266. 

 Volutidae, 260. 

 Volutimorpha, 260. 

 Volvox, 79. 

 Vom Rath, 470, 471. 

 Von Baer, 175. 

 Von Brunn, 403. 

 I'uipes alopex, ^^\ V. cinereoargenta- 



tus^ 48 ; / ". lagp/>us, 48 ; I', c'ciox, 48. 



Wallace, A. R., 3, 5, 228, 381, 383, 387, 



391, 392, 466. 

 Ward, L., 531. 

 Wasatch, 139, 146. 

 Weale, M., 231. 

 Weismann, 10, 11, 12, 23, 203, 399, 424 



438, 450, 458, 459, 480. 

 West Indies, 387. 

 White River, 139. 

 Wiedersheim, 366. 

 Wilson, E. B., 457, 487. 

 Wood, T. W., 230, 231, 233, 234. 

 Woodward, A. S., 372. 

 Wortman, 293, 402, 520. 

 Wundt, 498. 

 Wurtenburger, 189. 191. 



Yucatan, 49. 



Zeller, 242, 243. 

 Zeniedura iiiacrura, 52. 

 Zeuglodon, 304. 

 Zittel, Dr., 370. 

 Zittelloceras, 186. 

 Zygophyta, 77. 



