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On the Origin of Species By Means of Natural Selection

Page 403 of 406, printed 403

Variation: under domestication, 7. caused by reproductive system being affected by conditions of life, 8. under nature, 44. laws of, 131. Variations: appear at corresponding ages, 14, 86. analogous in distinct species, 159. Varieties: natural, 44. struggle between, 75. domestic, extinction of, 111. transitional, rarity of, 172. when crossed, fertile, 267. when crossed, sterile, 269. classification of, 423. Verbascum: sterility of, 251. varieties of, crossed, 270. Verneuil, M. de, on the succession of species, 325. Viola tricolor, 73. Volcanic islands, denudation of, 284. Vulture, naked skin on head, 197. Wading-birds, 386. Wallace, Mr.: on origin of species, 2. on law of geographical distribution, 355. on the Malay Archipelago, 395. Wasp, sting of, 202. 403
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