490 



TTJRBIT. 



INDEX. 



VARIETIES. 



and teeth in, ii. 365 ; polypoid, origin 

 of, ii. 377. 



Tcrbit (pigeon), i. 156, 219. 



Turkey, domestic, origin of, i. 308; 

 crossing of, with North Amf>rican wild 

 turkey, i. 308, 309 ; breeds of, i. 308; 

 crested white cock, i. 309 ; wild, cha- 

 racters of, i. 309, 310; degeneration 

 of, in India, i. 310; ii. 267; failure 

 of eggs of, in Delhi, ii. 145; feral, on 

 the Parana, i. 199 ; change produced 

 in, by domestication, ii. 250. 



Turkey, striped young pigs in, i. 80. 



" Turkische Taube," i. 146. 



Turner (pigeon), i. 164. 



Turner, C., on the hollyhock, i. 86. 



Turner, W., on cells, ii. 366. 



Turnips, origin of, i. 344 ; reversion in, 

 ii. 5 ; run wild, ii. 7 ; crosses of, ii. 71, 

 74; Swedish, preferred by hares, ii. 

 217 ; acclimatisation of, in India, ii. 

 302. 



Turnspit, on an Egyptian monument, 

 i. 17 ; crosses of the, ii. 70. 



Turtle-dove, white and coloured, 

 crossing of, ii. 70. 



Turtur auritus, hybrids of, with T. 

 cambayensis and T. suratensis, l. 

 203. 



Turtur risorius, crossing of, with the 

 common pigeon, i. 2u2 ; hybrids of, 

 with T. vulgaris, ibid. 

 Turtur suratensis, sterile hybrids of, 

 with T. vulgaris, i. 203 ; hybrids of, 

 with T. auritus, ibid. 

 Turtur vulgaris, crossing of, with the 

 common pigeon, i. 203 ; hybrid of, 

 with T. risorius, ibid. ; sterile hybrids 

 of, with T. suratensis and Ectopistes 

 migratorius, ibid. 



Tusks of wild and domesticated figs, i. 



79, 80. 

 Tussilago farfara, variegated, i. 410. 



Twin-seed of Fuchsia coccinea and 

 fulgens, i. 426. 



Tyeriian, B., on the pigs of the Pacific 

 Islands, i. 73, ii. 64 ; on the dogs of 

 the Pacific Islands, ibid. 



Tylor, Mr., on the prohibition of con- 

 sanguineous marriages, ii. 103. 



Udders, development of the, ii. 290. 

 Ulex, double-flowered, ii. 151, 



Ulmus campestris and effusa, hybrids of, 

 ii. 111. 



Uniformity of character, maintained 

 by crossing, ii. 62-67. 



Units of the body, functional independ- 

 ence of the, ii. 364—366. 



Unity or plurality of origin of organisms, 

 i. 13. 



Urea, secretion of, ii. 375. 



Use and disuse of parts, effects of, ii. 285, 

 293, 345, 346, 413, 414 ; in rabbits, i. 

 . 129-134; in ducks, i. 299-301. 



Utility, considerations of, leading to 

 uniformity, ii. 227. 



Valentin, experimental production of 

 double monsters by, ii. 385. 



Valletta, ii. 121. 



Van Beck, Barbara, a hairy-faced 

 woman, i. 448, 



Van Mons, on wild fruit-trees, i. 329, 

 ii. 248 ; production of varieties of the 

 vine, i. 353 ; correlated variability 

 in fruit-trees, ii. 324 ; production of 

 almond-like fruit by peach-seedlings, 

 i. 359. 



Vanessa, species of, not copulating in 

 captivitv, ii. 141. 



Variability, i. 4, ii. 366-369, 388-390, 

 401—416 ; causes of, ii. 237-255 ; cor- 

 related, ii. 311-332, 346, 347, 415, 

 416 ; law of, equable, ii. 344, 345 ; 

 necessity of, for selection, ii. 174; 

 of selected characters, ii. 225 ; of 

 multiple homologous parts, ii. 334. 



Variation, laws of, ii. 283-348 ; con- 

 tinuity of, ii. 227 ; possible limita- 

 tion of, ii. 228, 413, 414 ; in domestic 

 cats, i. 47-50 ; origin of breeds of 

 cattle by, i. 91 ; in osteological cha- 

 racters of rabbits, i. 120-136; of 

 important organs, i. 382 ; analogous 

 or parallel, i. 340-343 ; in horses, i. 

 58 ; in the horse and ass, i. 67 ; in 

 fowls, i. 255-258 ; in geese, i. 303 ; 

 exemplified in the production of 

 fleshy stems in cabbages, &c, i. 344 ; 

 in the peach, nectarine, and apricot, 

 i. 363, 365 ; individual, in wheat, i. 

 331. 



Variegation of foliage, i. 409, ii. 151. 



Varieties and species, resemblance of, 

 i. 4, ii. 406—408 ; conversion of, into 



