nroEX 



356 



Yarieriea, when croaaea, atenle, S. 43 



, claaaification of, ii. 224 



Verbaacmn, sCeriLty of, ii. 12 



, varieties of croaaed, iL 44 



Yerlot, M., on double stocks, L 386 

 Yemeiii] and d'Archiac, MM. de, on 



the succession of species, ii. 110 

 Vibracula of the Poljzoa, i. 328 

 Viola, small imperfect flowers of, L 

 295 



, tricolor, i. 113 



Virchow, on the structure of the crys- 

 talline lena, L 253 

 Virginia, pigs of, L 127 

 Volcanic islands, denudation of, ii. 60 

 Vulture, naked skin on head, L 273- 

 374 



W 



■WADES&-B1BDS, ii 184 



"Wagner, Dr., on Cecidomjia, ii. 249 



Wagner, Moritz, on the importance of 

 isolation, i 151 



Wallace, Mr., on origin of species, L 

 26 



, on the limit of variation under 



domes tication, i. 72 



, on dimorphic lepidoptera, i. 78, 



390 



, on races in the Malay Archipel- 

 ago, L 81 



, on the improvement of the eye, 



i. 253 



, on the walking-stick insect, L 



311 



, on laws of geographical distri- 

 bution, ii. 147 



, on the Malay Archipelago, ii. 



194 



, on mimetic animals, ii. 233 



Walsh, Mr. B. D., on phytophagic 

 forms, i. 82-83 



, on equal variability, i. 221 



Water, fresh, productions of , ii. 180 



Water-hen, L 248 



Waterhouse, Mr., on Australian mar- 

 supials, i. 164 



, on greatly developed parta being 



variable, i. 210 



, on the cells of bees, L 370 



, on general afflnitiea, iL 236 



Water-ouzel, i. 248 

 Watson, Mr. H. C, on range of varie- 

 ties of British plants, i. 80, 95 



, on acclimatization, L 158 



, on flora of Azores, iL 157 



, on Alpine plants, iL 161 



, on rarity of intermediate varie- 

 ties, L 238 



, on convergence, L 182 



, on the indefinite multiplication 



of species, L 183 

 Weale, Mr., on loctiats transporting 



seeds, iL 155 

 Web of feet in water-birds, L 249 

 Weiamann, Prot, on the causes of 

 variability, i. 32 



, on rudimentary organs, iL 269 



West Indian Islands, mammals of, iL 



194 

 Weacwood, Mr., on species in large 

 genera being closely allied to oth- 

 ers, i. 94 



, on the tarsi of Engidse, L 218 



, on the antennae of hymenopter- 



oua inaects, ii. 216 

 Whales, L 311 

 Wheat, varieties of, L 161 

 White Mountains, flora of, ii. 159 

 Whitaker, Mr. , on lines of escarpment, 



u. 59 

 Wichura, Max, on hybrids, ii. 30, 32, 



47 

 Wings, reduction of size, i. 194-195 

 of inaects homologous with bran- 

 chiae, L 257-258 



, rudimentary, in inaects, iL 265 



Wolf crossed with dog, i. 354 



