Page - 552 - in The Origin of Species

552 INDEX Wagner, Moritz, on the importance of isolation, ii6 Wallace, Mr., on origin of species, 21. , on the limit of variation un- der domestication, 56. -, on dimorphic lepidoptera, 61, 29s , on races in the Malay Archi- pelago, 63. , on the improvement of the eye, 193. on the walkmg-stick insect. 236. , on laws of geographical dis- tribution, 402. • , on the Malay Archipelago, 437 , on mimetic animals, 467. Walsh, Mr. B. D., on phytophagic forms, 64. , on equal variability, 168. Water, fresh, productions of, 427. Water-hen, 189. Waterhouse, Mr., on Australian marsupials, 126. , on greatly developed parts being variable, 161. , on the cells of bees, 280. -, on general affinities, 468. Watson, Mr. H. C., on range of varieties of British plants, 63, 74. , on acclimatisation, 153. , on flora of Azores, 410. , on Alpine plants, 413. , on rarity of intermediate va- rieties, 182. , on convergence, 138. on the indefinite multiplica- tion of species, 139. Weale, Mr., on locusts transporting seeds, 409. Web of feet in water-birds, 190. Weismann, Prof., on the causes of variability, 26. , on rudimentary organs, 493. West Indian Islands, mammals of, 437- Westwood, on species in large genera being closely allied to others, 73. , on the tarsi of Engids, 166. , on the antennse of hymenop- terous insects, 454. Whales, 236. Wheat, varieties of, 124. White Mountains, flora of, 412. Whitaker, Mr., on lines of escarp- ment, 337. Wichura, Max, on hybrids, 315, 328. Wings, reduction of size, 148. of insects homologous with branchiae, 195. -, rudimentary, in insects, 490. Wolf crossed with dog, 268. —— of Falkland Isles, 436. Wollaston, Mr., on varieties of in- sects, 64. , on fossil varieties of shells in Madeira, 69. on colours of insects on sea- shore, 146. , on wingless beetles, 148, 149. , on rarity of intermediate va- rieties, 182. , on insular insects, 432. on land-shells of Madeira naturalised, 443. Wolves, varieties of, 103. Woodcock with earth attached to leg, 409. Woodpecker, habits of, 188. , green colour of, 207. Woodward, Mr., on the duration of specific forms, 347. ; on Pyrgoma, 357. , on the continuous succession of genera, 367. , on the succession of types, 389. World, species changing simultane- ously throughout, 374. Wrens, nest of, 296. Wright, Mr. Chauncey, on the giraffe, 231. , on abrupt modifications, 260. Wyman, Prof., on correlation of colour and effects of poison, 30. -, on the cells of the bee, 282. Youatt, Mr., on selection, 46. , on sub-breeds of sheep, 50. _ , on rudimentary horns in young cattle, 494. Zanthoxylon, 227. Zebra, stripes on, Zeuglodon, 379. 171.