SFENCER. 



INDEX. 



STURM. 



479 



Spencer, Lord, on selection in breeding, 



ii. 195. 

 Spencer, Herbert, on the " survival of the 

 fittest," i. 6 ; increase of fertility by 

 domestication, ii. Ill; on life, ii. 148, 

 177 ; changes produced by external 

 conditions, ii. 281 ; effects of use on 

 organs, ii. 295, 296 ; ascent of the sap 

 in trees, ii. 296 ; correlation exemplified 

 in the Irish elk, ii. 333-331 ; on " phy- 

 siological units," ii. 375 ; antagonism of 

 growth and reproduction, ii. 384 ; for- 

 mation of ducts in plants, ii. 300. 



Spermatophores of the cephalopoda, ii. 

 383. 



Spermatozoids, ii. 363-364 ; apparent in- 

 dependence of, in insects, ii. 384. 



Sphingid^, sterility of, in captivity, ii. 

 157. 



Spinola, on the injurious effect produced 

 by flowering buckwheat on white pigs, 

 ii. 337. 



Spitz dog, i. 31. 



Spooner, W. C, cross-breeding of sheep, 

 i. 100, ii. 95-96, 120; on the effects of 

 crossing, ii. 96-97; on crossing cattle, 

 ii. 118; individual sterility, ii. 162. 



Spores, reproduction of abnormal forms 

 by, i. 383. 



Spouts, i. 373 ; in pigeons, i. 213. 



Spot pitjeon, i. 156, 207. 



Sprengel, C. K., on dichogamous plants, 

 ii. 90 ; on the hollyhock, ii. 107 ; on 

 the functions of flowers, ii. 175. 



Sproule, Mr., inheritance of cleft-palate 

 and hare-lip, ii. 24. 



Spurs, of fowls, i. 255 ; development of, 

 in hens, ii. 318. 



Squashes, i. 357. 



Squinting, hereditary, ii. 9. 



Squirrels, generally sterile in captivity 

 ii. 152. l J 



Squirrels, flying, breeding in confine- 

 ment, ii. 152. 



" Staarhalsige Taube," i. 161. 



Stag, one-horned, supposed heredity of 

 character in, ii. 12 ; degeneracy of, in 

 the Highlands, ii. 208. 



Stamens, occurrence of rudimentary, ii. 

 316 ; conversion of, into pistils, i. 365 • 

 into petals, ii. 392. 



StaphyUa, ii. 168. 



Steenstrup, Prof., on the dog of the 

 Danish Middens, i. 18 ; on the obliquity 

 of flounders, ii. 53. 



Steinan, J., on hereditary diseases, ii. 7, 



Sterility, in dogs, consequent on close 

 confinement, i. 32; comparative, of 

 crosses, ii. 103,104; from changed con- 

 ditions of life, ii. 148-165 ; occurring in 

 the descendants of wild animals bred 



m captivity, ii. 160 ; individual, ii. 

 162; resulting from propagation by 

 buds, cuttings, bulbs, &c, ii. 169- in 

 hybrids, ii. 178-180, 386, 410-411 •' in 

 specific hybrids of pigeons, i. 193'- as 

 connected with natural selection' ii 

 185-189. 

 Sternum, characters of the, in rabbits i 

 123; in pigeons, i. 167, 174-175 -'in 

 fowls, i. 268, 273 ; effects of disuse on 

 the, i. 174-175, 273. 

 Stephens, J. F., on the habits of the 



Bombycidaa, i. 303. 

 Stewart, H., on hereditary disease, ii. 79. 

 Stigma, variation of the, in cultivated 

 Cucurbitacese, i. 359 ; satiation of the 

 i. 402-403. 

 Stocks, bud- variation in, i. 381 ; effect of 

 crossing upon the colour of the seed of, 

 i. 398-399 ; true by seed, ii. 20 ; crosses 

 of, n. 93 ; varieties of, produced by se- 

 lection, ii. 219; reversion by the upper 

 seeds in the pods of, ii. 347-348. 

 Stockholm, fruit-trees of, ii. 307." 

 Stokes, Prof., calculation of the chance 

 of transmission of abnormal peculi- 

 arities in man, ii. 5. 

 Stolons, variations in the production of, by 



strawberries, i. 353. 

 Stomach, structure of the, affected by 



food, ii. 302. 

 Stone in the bladder, hereditary, ii. 8, 79. 

 Strawberries, i. 351-354; remarkable 

 varieties of, i. 352-353; hautbois, di- 

 oecious, i. 353; selection in, ii. 200; 

 mildew of, ii. 228; probable further 

 modification of, ii. 243; variegated, 

 effects of soil on, ii. 274. 

 Strickland, A., on the domestication of 

 Anser ferus, i. 287 ; on the colour of the 

 bill and legs in geese, i. 288. 

 Strictoenas, i. 183. 



Stripes on young of wild swine, i. 76 ; of 

 domestic pigs of Turkey, Westphalia, 

 and the Zambesi, i. 76-77 ; of feral 

 swine of Jamaica and New Granada, i. 

 77 ; of fruit and flowers, i. 400, ii. 37 ; 

 in horses, i. 56-60 ; in the ass, i. 62-63 ; 

 production of, by crossing species of 

 Equidse, ii. 42-43. 

 Strix grallaria, ii. 302. 

 Strix passer ma, ii. 154. 

 " Strupp-Taube," i. 155. 

 Struthers, Mr., osteology of the feet in 

 solid-hoofed pigs, i. 75 ; on polydaetyl- 

 ism, ii. 13-14. 

 Sturm, prepotency of transmission of 

 characters in sheep and cattle, ii. 66 ; 

 absorption of the minority in crossed 

 races, ii. 88; correlation of twisted 

 horns and curled wool in sheep, ii. 

 326. 



