338 



TUMBLEB. 



INDEX. 



WATERHOUSE. 



Tumbler, youug of, ii 248. 

 Turkey-cock, tuft of hair on breast, 



i. lib. 



, naked skin on head, i. 248. 



, young of, instinctively wild, 



i. 3id. 

 Turnip and cabbage, analogous 



variations of, i. 195. 

 Type, unity of, i. 260, 261. 

 Types, succession of, in same areas, 



ii. 121. 

 Typotherium, ii. 108. 



TJ. 



Udders enlarged by use, i. 12. 



, rudimentary, ii, 256. 



Ulex, young leaves of, ii. 241. 

 UmliellifLr;e, flowers and seeds of, 



i. 180. 

 , outer and inner florets of, i. 



270. 

 Unity of type, i. 260, 261. 

 Uria lacrymans, i. 113. 

 Use, eftects of, under domestication, 



1. 12. 

 , eff'ects of, in a state of nature, 



i. 167. 

 Utility, how far important in the 



construction of each part, i. 249. 



Valenciennes, on fresh-water fish, 



ii. 173. 

 Variaiiility of mongrels and hybrids, 



ii. 39. 

 Variation under domestication, i. 8. 

 caused by reproductive system 



being ailecteil by conditions of 



life, i. 10. 



under nature, i. 51. 



• , laws of, i. 164. 



-, correlated, i. 13, 177, 248. 



Variations appear at corresponding 



ages, i. 16, luo. 

 analogous in distinct species, 



i. 193. 

 Varieties, nutural, i. 50. 



, struggle between, i. 93. 



, domestic, extinction of, i. 134. 



, transitional, rarity of, i. 208. 



, 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. 

 Verneuil, M. de, on the succession 



of species, ii. 103. 

 Vibraeuk of the Polyzoa, i. 301. 

 Viola, small imperfect flowers of, i. 



269. 



, tricolor, i. 90. 



Virchow, 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 



230. 

 Wagner, Moritz, on the importance 



of isolation, i. 127. 

 Wallace, Mr., on origin of spi cies, 



i. 2. 

 , on the limit of variation under 



domestication, i. 48. 

 , on dimorphic lepidoptera, i. 



55, 362. 

 , on 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 INlalay Archipelago, ii 



185. 



, on mimetic animals, ii. 224. 



Walsh, Mr. B. D., on phytopbagic 



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. 

 , on greatly developed parts 



being variable, i. 185. 



, on the cells of bees, i. 343. 



, on general affinities, ii. 227. 



