OCR Text |
Show 432 INDEX. Tierra dol Fuego, dogs of, 192. plants of, 326, 329. Timber-drift, 314. Time, lapse of, 247. Titmouse, 164. Toads on islands, 342. Tobacco crossed varieties of, 239. Tomes, 'Mr., on the distribution of bats, 343. Transitions in varieties rare, 155. Trees on islands belong to peculiar orders, 34.2. with separated sexes, 93. Trifolium pratense, 71, 89, incarnatum, 89. Trigonia, 281. Trilobites 268. sudden extinction of, 281. Troglodytes 216. Tucutucu, blind, 125. Tumbler pigeons, habits of, hereditary, 191. young of, 387. Turkey-cock, brush of hair on breast, 85. Turkey, naked skin on head, 176. young, wild, 192. Turnip and cabbage, analogous variations of, 144. Type, unity of1 184. Types, successwn of, in same areas, 295. Udders enlarged by use, 17. rudimentary, 392. Ulex, young leaves of, 382. Umbelliferm, outer and inner- florets of, 131. Unity of type 184. Use, effects of, under domestication, 17. effects of, in a state of nature, 122, 123, Utility, how far important in the con-struction of each part, 178. Valenciennes on fresh-water fish, 335. Variability of mongrels and hybrids, 241. Variation under domestication, 14. caused by reproductive system being affected by conditions of life, 15. under nature, 46. laws of, 120. Variations appear at corresponding ages, 20, 82. analogous in distinct species, 144. Varieties, natural, 46. struggle between, 73. domestic, extinction of, 104. transitional, rarity of, 154. when crossed, fertile, 236. when crossed, sterile, 237. classification of, 368. Verbascum, sterility of, 222. varieties of, crossed, 238. Verneuil, M. de, on the succession of spe-cies, 284. Viola tricolor, 71. Volcanic islands, denudation of, 249. Vulture, naked skin on head, 176. Wading-birds, 837. Wallace, Mr., on origin of species, 10. on law of geographical distribution, on3 1th0.e Malay Archipelago, ~""" Wasp, sting of, 180. Water, fresh, productions of, 334. Water-hen, 166. Waterhouse, Mr., on .Australian marsupials, 108. on greatly developed parts being variable, 136. on cells of bees, 200. on general affinities, 373. Water-ouzel, 166 . . Watson, Mr. H. C., on range of varieties of British plants, 68. on acclimatisation, 128. on flora of Azores, 316. on Alpine plants, 320 327. on rarity of intermediate varieties, 158. Weald, denudation of, 250. Web of feet in water-birds, 166. West Indian islands, mammals of, 344. Westwood on species in large genera being closely allied to others, 57. on the tarsi of Engidm, 142. on the antennm of hymenopterous insects, 362. Whales, fossil, 265. Wheat varieties of, 105. White Mountains, flora of, 318. Wings, reduction of size, 123. , of insects homologous with branchim, 171. rudimentary, in insects, 391. Wolf crossed with dog, 191. of Falkland Isles, 343. Wollaston, Mr., on varieties of insects, 50. on fossil varieties of land-shells in Madeira, 53. on colours of insects on sea-shore, 121. on wingless beetles, 124. on rarity of intermediate varieties, 158. on insular insects, 339, on land-shells of Madelra, naturalised, 350. Wolves, varieties of, 86, Woodpecker, habits of, 165, green colour of, 176. Woodward, Mr:, on the duration of spocific forms, 257. on the continuous succession of genera, 276. on the succession of types 296. World, species changing simultaneously throughout, 282, Wrens, nest of, 215. Youatt, Mr., on selection, 34, on sub-breeds of sheep, 39. on rudimentary hol·ns in young cattle, 394. Zebra, stripes on, 147. |