SELECTION. 



INDEX. 



SILK-FOWLS. 



477 



tremes, ii. 239-242 ; possible limit of, 

 ii. 242 ; influence of time on, ii. 243- 

 244 ; summary of subject, ii. 246-249 ; 

 effects of, in modifying breeds of cattle, 

 i. 92, 93; in preserving the purity of 

 breeds of sheep, i. 99-100 ; introducing 

 varieties of pigeons, i. 213-218; in breed- 

 ing fowls, i. 232-233 ; in the goose, i. 

 289 ; in the canary, i. 295 ; in the gold- 

 fish, i. 296; in the silkworm, i. 300- 

 301 ; contrasted in cabbages and cereals, 

 i. 323 ; in the wldte mulberry, i. 334 ; 

 on gooseberries, i. 356 ; applied to wheat, 

 i. 317-318; exemplified in carrots, &c, 

 i. 326 ; in the potato, i. 331 ; in the 

 melon, i. 360; in flowering plants, i. 

 365 ; in the hyacinth, i. 371 ; applied 

 to bud-varieties of plants, i. 411; illus- 

 trations of, ii. 421-428. 



Selection, sexual, ii. 75. 



Self-impotence in plants, ii. 131-140 ; in 

 individual plants, ii. 136-138 ; of hy- 

 brids, ii. 174. 



Selwyn, Mr., on the Dingo, i. 26. 



Selys-Longchamps, on hybrid ducks, i. 

 190, ii. 46, 157 ; hybrid of the hook- 

 billed cluck and Egyptian goose, i. 282. 



Seringe, on the St. Valery apple, i. 350. 



Serpent Melon, i. 360. 



Serres, Olivier de, wild poultry in Gui- 

 ana, i. 237. 



Sesamum, white-seeded, antiquity of the, 

 ii. 429. 



Setaria, found in the Swiss lake-dwell- 

 ings, i. 317. 



Setters, degeneration of, in India, i. 38 ; 

 Youatt's remarks on, i. 41. 



Sex, secondary characters of, latent, ii. 

 51-52 ; of parents, influence of, on hy- 

 brids, ii. 267. 



Sexual characters, sometimes lost in 

 domestication, ii. 74. 



Sexual limitation of characters, ii. 71- 

 75. 



Sexual peculiarities, induced by domes- 

 tication in sheep, i. 95 ; in fowls, i. 251- 

 257 ; transfer of, i. 255-257. 



Sexual variability in pigeons, i. 161- 

 162. 



Sexual selection, ii. 75. 



Shaddock, i. 335. 



Shailer, Mr., on the moss-rose, i. 379- 

 380. 



Shanghai fowls, i. 227. 



Shanghai sheep, their fecundity, i. 97. 



Shan ponies, striped, i. 58. 



Sheep, disputed origin of, i. 94 ; early 

 domestication of. i. 94 ; large-tailed, i 

 94, 95, 98, ii. 279 ; variations in horns* 

 mammae and other characters of, i. 95 • 

 sexual characters of, induced by domes- 

 tication, i. 95, 96 ; adaptation of, to cli- 



mate and pasture, i. 96, 97 ; periods of 

 gestation of, i. 97 ; effect of heat on the 

 fleece of, i. 98-99, ii. 278 ; effect of 

 selection on, i. 99-101; "ancon" or 

 "otter" breeds of, i. 17, 92, 100; 

 " Mauchamp-mcrino," i. 100-101 ; cross 

 of German and merino, ii. 85-89 ; black, 

 of the Tarentino, ii. 227 ; Karakool,' 

 ii. 278 ; Jaffna, with callosities on the 

 knees, ii. 302 ; Chinese, ii. 315 ; Danish, 

 of the bronze period, ii. 427 ; polydac- 

 tylism in, ii. 14 ; occasional production 

 of horns in hornless breeds of, ii. 30; 

 reversion of colour in, ii. 30 ; influence 

 of male, on offspring, ii. 68 ; sexual dif- 

 ferences in, ii. 73 ; influence of crossing 

 or segregation on, ii. 86, 95-96, 102- 

 103 ; interbreeding of, ii. 119-120 ; 

 effect of nourishment on the fertility 

 of, ii. 111-112; diminished fertility of, 

 under certain conditions, ii. 161 ; un- 

 conscious selection of, ii. 213 ; natural 

 selection in breeds of, ii. 224, 225, 227 ; 

 reduction of bones in, ii. 242 ; individual 

 differences of, ii. 251 ; local changes 

 in the fleece of, in England, ii. 278 ; 

 partial degeneration of, in Australia!, 

 ii. 278 ; with numerous horns, ii. 291 ; 

 correlation of horns and fleece in,ii. 326 ; 

 feeding on flesh, ii. 303; acclimatisa- 

 tion of, ii. 305-306; mountain, resistance 

 of, to severe weather, ii. 312; white, 

 poisoned by Hypericum crispum, ii. 

 837. 



Sheep dogs resembling wolves, i. 24. 



Shells, sinistral and dextral, ii. 53. 



Sheriff, Mr. new varieties of wheat, i. 

 315, 317; on crossing wheat, ii. 104- 

 105 ; continuous variation of wheat, ii. 

 241. 



Siam, cats of, i. 47 ; horses of, i. 53. 



Shirley, E. P., on the fallow-deer, ii. 

 103, 120. 



Short, D., hybrids of the domestic cat 

 and Felis ornata, i, 45. 



Siberia, northern range of wild horses in, 

 i. 52. 



Sichel, J., on the deafness of white cats 

 with blue eyes, ii. 329. 



Sidney, S., on the pedigrees of pigs, ii. 3 ; 

 on cross-reversion in pigs, ii. 35 ; period 

 of gestation in the pig, i. 74 ; produc- 

 tion of breeds of pigs by intercrossing, 

 i. 78, 95; fertility of the pig, ii. 112; 

 effects of interbreeding on pigs, ii. 121- 

 122 ; on the colours of pigs, ii. 210, 

 229. 



Siebold, on the sweet potato, ii. 309. 



Siebold, von Carl, on parthenogenesis, ii 

 364. 



Silene, contabescence in, ii. 166. 



Silk-fowls, i. 230, ii. 67, 69. 



