336 



STAR-FISHES. 



INDEX. 



UDDERS. 



Star-Fishes, their pedioellarise, i. 299. 

 Sterility from changed conditions 



of life, i. 10. 



of hybrids, ii. 3. 



, laws of, ii. 11. 



■ , causes of, ii. 20. 



, from unfavourable conditions, 



ii. 26. 

 not induced through natural 



selection, ii. 21. 

 St. Helena, productions of, ii. 1Y8. 

 St. Hilaire, Aug., on variability of 



certain plants, i. 272. 



, on classification, ii. 209. 



St. John, Mr., on habits of cats, i. 



825. 

 Sting of bee, i. 256. 

 Stocks, aboriginal, of domestic ani- 

 mals, i. 22. 

 Strata, thickness of, in Britain, ii. 55. 

 Stripes on horses, i. 199. 

 Structure, degreesof utility of, i. 249. 

 Struggle for existence, i. 75. 

 Succession, geological, ii. 89. 



of types in same areas, ii 121. 



Swallow, one species supplanting 



another, i. 93. 

 Swaysland, Mr., on earth adhering 



to the feet of migratory birds, ii. 



148. 

 Swifts, nests of, i. 355. 

 Swim-bladder, i. 230. 

 Switzerland, lake habitations of, i 



20. 

 System, natural, ii. 204 



TailofgirafFe, i. 245. 



of aquatic animals, i. 246. 



, prehensile, i. 294. 



, rudimentary, ii. 260. 



Tanais, dimorphic, i. 55. 



Tarsi, deficient, i. 168. 



Tausch, Dr., on umbelliferae, 1. 271. 



Teeth and hair correlated, i. 179. 



, rudimentary, in embryonic, 



calf, ii. 255, 292. 

 Tegetmeier, Mr., on cells of bees, i. 



346, 352. 

 Temminck, on distribution aiding 



classification, ii. 211. 

 Tendrils, their development, i. 305. 

 Thompson, Sir W., on the age of 



the habitable world, ii. 83. 

 • , on the consolidation of the 



crust of the earth, ii. 275. 



Thouin, on grafts, ii. 19. 



Thrush, aquatic species of, i. 222. 



, mocking, of^the Galapagos, ii. 



192. 



, young of, spotted, ii. 241. 



, nest of, i. 364. 



Thuret, M., on crossed fuoi, ii. 15. 



Thwaites, Mr. on acclimatisation, 

 i. 174. 



ThylacinuB, ii. 220. 



Tierra del Fuego, dogs of, i. 328. 



, plants of, ii. 169. 



Timber-drift, ii. 145. 



Time, lapse of, ii. 51. 



by Itself not causing modifica- 

 tion, i. 126. 



Titmouse, i. 220. 



Toads on islands, ii. 182. 



Tobacco, crossed varieties of, ii. 38. 



Tomes, Mr., on the distribution ot 

 bats, ii. 184. 



Transitions in varieties rare, i. 208. 



Traquair, Dr., on flat-fish, i. 293. 



Trautschold, on intermediate varie- 

 ties, ii. 66. 



Trees on islands belong to peculiar 

 orders, ii. 182. 



with separated sexes, i. 123. 



Trifolium pratense, i. 90, 117. 



incamatum, i. 117. 



Trigonia, ii. 99. 



Trilobites, ii. 83. 



, sudden extinction of, ii. 99. 



Trimen, Mr., on imitating-insects, 

 ii. 224i 



Trimorphism in plants, i. 55 ; ii. 29. 



Troglodytes, i. 364. 



Tuco-tuco, blind, i. 170. 



Tumbler pigeons, habits of, heredi- 

 tary, i. 327. 



— — , young of, ii. 248. 



Turkey-cock, tuft of hair on breast, 

 i. 110. 



, naked skin on head, i. 248. 



. young of, instinctively wild, 



i. 329. 



Turnip and cabbage, analogous 

 variations of, i. 195. 



Type, unity of, i. 260, 261. 



Types, succession of, in same areaa 

 ii. 121. 



Typotherium, ii. 108. 



U. 



Udders enlarged by use, i. 12. 

 , rudimentary, ii. 256. 



