m-EX. 



INDEX. 



WHALES. 



337 



tJlex, young leavea of, iL 241. 

 tJmbelliferae, flowers and seeds of, 



i. 180. 



, outer and inner florets of, i. 270. 



Unity of type, i. 260, 261. 



Uria lacryinans, i. 113. 



Use, effects of, under domestication, 



i. 12. 

 , effects 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. 

 Variability of mongrels and hy- 

 brids, ii. 39. 

 Variation under domestication, i. 8. 

 caused by reproductive system 



being affected by conditions of 



life, I 10. 



under nature, i. 51. 



, laws of, i. 164. 



, correlated, L 13, 177, 248. 



Variations appear at corresponding 



ages, i. 16, 105. 

 analogous in distinct species, 



i. 193. 

 Varieties, natural, 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. 



Verbasoum, 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. 

 Vibracula of the Polv2oa,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. 239. 



Wagner, Moritz, on the importance 

 ot isolation, L 127. 



Wallace, Mr., on origin of species, 

 i. 2. 



, on the limit of variation under 



domestication, i. 48. 



, on dimorphic Icpidoptera, i. 



55, 362. 

 , on races in the Malay Archi- 

 pelago, 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 phytophagio 

 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 afiuiities, ii. 227. 



Water-ouzel, i. 222. 



Watson, Mr. H. C, on range of 

 varieties of British plants, i. 57, 

 73. 



, on acclimatisation, i. 134. 



, on flora of Azores, ii. 149. 



, on Alpine plants, ii. 153. 



, on rarity of intermediate va- 

 rieties, i. 212. 



, on convergence, i. 156. 



, on the indefinite multiplica- 

 tion of species, i. 157. 



Weale, Mr., on locusts transporting 

 seeds, ii. 147. 



Web of feet in water-birds, i. 223. 



Weismann, Prof., on the causes of 

 variability, i. 8. 



, on rudimentary organs, ii. 260. 



West Indian Islands, mammals of, 

 ii. 185. 



Westwood, on species in large gen- 

 era being closely allied to others, 

 i. 71. 



, on the tarsi of Engidse, i. 192. 



, on the antennae of hymeno- 



■pterous insects, ii. 207. 



Whales, i. 285. 



