338 



TOIBLEB. 



INDEX. 



WATERH0T7SE. 



Tumbler, young of, ii. 248. 

 Turkev-cock, tuft of hair on breast, 



i. lib. 



, naked skin on head, i. 24S. 



. voun? of, instinctively wild, 



i. 329. 

 Turnip and cabbage, analogous 



variations of, i. 195. 

 Type, unity of, i. 260, 261. 

 Tvpes. succession of, in same areas, 



"ii. 121. 

 Typotherium, ii. 108. 



U. 



Udders enlarged by use, i. 12. 



, rudimentary, ii. 256. 



Ulex, young leaves of, ii. 241. 

 Umbelliftrje, flowers and seeds of, 



i. 180. 

 , outer aud inner florets of, i. 



270. 

 Unity of type, i. 260, 261. 

 Uria lacrymans, i. 113. 

 Use, effects of, under domestication, 



i. 12. 

 , effects of. in a state of nature, 



i. 167. 

 Utility, lmw far important in the 



construction of each part, i. 249. 



V. 



Valenciennes, on fresh-water fish, 



ii. 173. 

 Varia bility of mongrels and hybrids, 



ii. 39. 

 Variation under domestication, i. 8. 

 caused by reproductive system 



being . by conditions of 



life, i. 10. 



under nature, i. 51. 



, la\\> o\ i. 164. 



. correlated, i. 13, 177, 248. 



Variations appear at corresponding 



. i. 16, 1 5. 

 • analogous in distinct species, 



i. 19a 

 Varieties, natural, i. 50. 



, struggle b tween, i. 93. 



, domestic, extinction of, i. 131. 



, transitional, rarity of. i. 208. 



i , when crossed, fertile, ii. 34. 



Varieties, when crossed, sterile, ii. 37 



, classification of, ii, 215. 



Verbascum, sterility of, ii. 7. 



. varieties of crossed, ii. 38. 



Verlot, M., on double stocks, i. 358. 

 Vemeuil. M. de, on the succession 



of species, ii. 103. 

 Vibracula of the Polyzoa, i. 301. 

 Viola, small imperfect flowers of, i. 



269. 



-, tricolor, i. 90. 



Viichow, on the structure of the 



crystalline lens, i. 227. 

 Virginia, pigs of, i. 104. 

 Volcanic islands, denudation of, ii. 



54. 

 Vulture, naked skin on head, i. 247. 



W 



Wading-birds, ii. 175. 



Wagner, Dr., on Cecidomyia, ii 



239. 

 Wagner, Moritz, on the importance 



of isolation, i. 127. 

 Wallace, Mr., on origin of species, 



i. 2. 

 , on the limit of variation under 



domestication, i. 48. 

 , on dimorphic lepidoptera, i. 



55, 362. 

 , i n races in the Malay Archi- 



pelagi », i. 58. 

 , on the improvement of the 



eye, i. 227. 

 , on the walking-stick insect, i 



284. 

 , on laws of geographical dis- 

 tribution, ii. 139. 

 , on the Malay Archipelago, ii 



185. 



, on mimetic animals, ii. 224. 



Walsh, Mr. B. D., on phytuphagic 



forms, i. 60. 



. on equal variability, i. 195. 



Water, fresh, productions of, ii. 171. 



Water-hen. i. 222. 



Waterhouse, Mr., on Australian 



marsupials, i. 140. 

 . en greatly developed parts 



being variable, i. 185. 



, on the cells of bees, i. 313. 



, on general affinitk-s, ii. 227. 



