478 



SILK-MOTH. 



INDEX. 



SPECIES. 



Silk-moth, Arrindy, ii. 306, 312; Tarroo 

 ii. 157. ' 



Silk-moths, i. 300-304; domesticated 



species of, i. 300; history of, ibid.] 

 causes of modification in, i. 300-301 • 

 differences presented by, i. 301-304- 

 crossing of, ii. 98 ; disease in, ii. 228 ;' 

 effects of disuse of ] arts in, ii. 298; 

 selection practised with, ii. ]97 5 199' 



variation of, ii. 236; parthenogenesis 

 in, ii. 364. 



Silkworms, variations of, i. 301-302; 

 yielding white cocoons, less liable to 

 disease, ii. 336. 



Silver-Grey rabbit, i. 108, 111, 120. 



Simonds, J. B., period of maturity in 

 various breeds of cattle, i. 87; differ- 

 ences in the periods of dentition in 

 sheep, i. 96; on the teeth in cattle, 

 sheep, &c., ii. 322 ; on the breeding of 

 superior rams, ii. 196. 



Simon, on the raising of eggs of the silk- 

 moth in China, ii. 197. 



Simpson, Sir J., regenerative power of the 

 human embryo, ii. 15. 



Siredon, breeding in the branchiferous 



stage, ii. 384. 

 Siskin, breeding in captivity, ii. 154. 



Sivatherium, resemblance of the, to Niata 

 cattle, i. 89. 



Size, difference of, an obstacle to crossing, 

 ii. 101. 



Skin, and its appendages, homologous, 

 ii. 325; hereditary affections of the, 

 ii. 79. 



Skirving, E. S., on pigeons settling on 

 trees in Egypt, i. 181. 



Skull, characters of the, in breeds of 

 dogs, i. 34 ; in breeds of pigs, i. 71 ; in 

 rabbits, i. 116-120, 127; in breeds of 

 pigeons, i. 163-165; in breeds of fowls, 

 i. 260-266 ; in ducks, i. 282-283. 



Skull and horns, correlation of the, ii. 

 333. 



Skylark, ii. 154. 



Sleeman, on the Cheetah, ii. 151. 



Sloe, i. 345. 



Small-pox, ii. 378. 



Smiter (pigeon), i. 156. 



Smith, Sir A., on Caffrarian cattle, i. 88 ; 

 on the use of numerous plants as food 

 in South Africa, i. 307. 



Smith, Colonel Hamilton, on the odour of 

 the jackal, i. 30 ; on the origin of the 

 dog, i. 16 ; wild dogs in St. Domingo, 

 i. 28 ; on the Thibet mastiff and the 

 alco, i. 28-29 ; development of the fifth 

 toe in the hind feet of mastiffs, i. 35 ; 

 differences in the skull of dogs, i. 34 ; 

 history of the pointer, i. 42 ; on the ears 

 of the dog, ii. 301 ; on the breeds of 

 horses, i. 49; origin of the horse, i. 51 ; 



dappling of horses, i. 55 ; striped horses 

 in Spain, i. 58; original colour of the 

 horse, i. 60; on horses scraping away 

 snow, i. 52 ; on Asinus hemionus, ii. 43 ; 

 feral pigs of Jamaica, i. 77-78. 



Smith, Sir J. E., production of nectarines 

 and peaches by the same tree, 1. 340 ; 

 on Viola amama, i. 368 ; sterility of 

 Vinca minor in England, ii. 170. 



Smith, J., development of the ovary in 



Bonatea speciosa, by irritation of the 

 stigma, i. 403. 



Smith, N. H., influence of the bull " Fa- 

 vourite " on the breed of Short-horn 

 cattle, ii. 65. 



Smith, W., on the inter-crossing of straw- 

 berries, i. 352. 



Snake-rat, ii. 87, 88. 



Snakes, form of the viscera in, ii. 344. 



Snapdragon, bud-variation in, i. 381 ; 



non-inheritance of colour in, ii. 21 ; 



peloric, crossed with the normal form' 



• ii. 70, 93; asymmetrical variation of 

 the, ii. 322. 



Soil, adaptation of plums to, i. 346 ; in- 

 fluence of. on the zones of pelargoniums, 

 i. 366 ; on roses, i. 367 ; on the variega- 

 tion of leaves, i. 383; advantages of 

 change of, ii. 146-148. 



Soil and climate, effects of, on straw- 

 berries, i. 353. 



Solarium, non-intercrossing of species of, 



ii. 91. 

 Solanum tuberosum, i. 330-331. 



Solid-hoofed pigs, i. 75. 



Solomon, his stud of horses, i. 55. 



Somerville, Lord, on the fleece of Merino 

 sheep, i. 99 ; on crossing sheep, ii. 120 ; 

 on selection of sheep, ii. 195 ; dimin- 

 ished fertility of Merino sheep brought 

 from Spain, ii. 161. 



Sooty fowls, i. 230, 256. 



Soto, Ferdinand de, on the cultivation of 

 native plants in Florida, i. 312. 



Sorghum, i. 371. 



Spain, hawthorn monogynous in, i. 364. 



Spallanzani, on feral rabbits in Lipari, 

 i. 113 ; experiments on salamanders, ii. 

 15, 293, 385 ; experiments in feeding a 

 pigeon with meat, ii. 304. 



Spaniels, in India, i. 38 ; King Charles's, 

 i. 41 ; degeneration of, caused by inter- 

 breeding, ii. 121. 



Spanish fowls, i. 227, 250, 253 ; figured, 

 i. 226; early development of sexual 

 characters in, i. 250, 251 ; furcula of, 

 figured, i. 268. 



Species, difficulty of distinguishing from 

 varieties, i. 4; conversion of varieties 

 into, i. 5 ; origin of, by natural selec- 

 tion, ii. 414-415 ; by mutual sterility of 

 varieties, ii. 185-189. 



* 





