i90 



INDEX. 



VARIETIES. 



and teeth in, ii. 365 ; polypoid, origin 

 of, ii. 377. 



Turrit (pigeon), i. 155. 219. 



Turkey, domestic, origin of, i. 308 ; 

 crossing of, with North American wild 

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

 crested ^hite 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. 



" TURKI3CHE TACBE," 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. 

 Ti'RTLE-doye, white and coloured, 



crossing of. ii. 70. 

 Turtur auritus, hybrids of, with T. 



cambayensis and T. suratensis, i. 



203. 

 Turtur risorius, crossing of, with the 



common pigeon, i. 2l>2 ; 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 JSctopistes 



migratorius, 

 Tusks of wild and domesticated pigs, i. 



79, 80. 

 TussiLvjo farfara, variegated, i. 410. 

 Twin-seed of Fuchsia coccinea and 



fulgens, i. 426. 

 Tyekman. B.. on the pigs of the Pacific 



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



the Pacific Island-. 

 Tvlor, Mr., on the prohibition of con- 

 sanguineous marriages, ii. 103. 



Udders, development of the, ii. 290. 

 Uiex, double-tic vered, 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. 364-3t6. 

 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. 



YaUota, 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. 



}'anessa, speeh-s of, not copulating in 

 captivity, 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. 406-406 ; conversion of into 



