LXDEX. 



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. 39o; origin of, 209. 

 Unionidae, 203. 

 United States, 49, 53, 315. 

 Urochorda, 82. 

 Urodela, 109, no, 172. 

 Uropeltidae, 123. 

 Uroplates, 88. 



Ursus arctos, 21, 22 ; U. maritimus, 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 doliata, 

 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. 



Vol a, 266. 



Volutidae, 260. 



Volutimorpha, 260. 



Volvox, 79. 



V0111 Rath, 470, 471. 



Von Baer, 175. 



Von Brunn, 403. 



l'ul/>es alopex, 48; /'. cinereoargenta- 

 tus 48 ; / ". lagopus, 48 ; / ". velox, 48. 



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



391, 392, 466. 

 Ward, L., 531. 

 Wasatch, 139, 146. 

 Weale, M., 231. 

 Weismann, 10, n, 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. 

 YVurtenburger, 189. 191. 



Yucatan, 49. 



Zeller, 242, 243. 

 Zencedura macrura, 52. 



Zeuglodon, 304. 

 Zittel, Dr., 370. 

 Zittelloceras, 186. 

 Zygophyta, 77. 



