336 



SCHACHT. 



INDEX. 



SQUALODON. 



Schacht, Prof., on Phyllotaxy, i. 



270. 

 Schiijdte, on blind insects, i. 172. 



, on flat iish, i. 290. 



Schle.t;;el, on snakes, i. 178. 

 Schiiljl, Dr., on tlie ears of mice, i. 



268. 

 Scott, J., Mr., on the self-sterility 



of orcbids, ii. 7. 

 , on the crossing of varieties of 



verbaseum, ii. 38. 

 Sea-wattr, how far injurious to 



seeds, ii. 142. 

 not destructive to land-shells, 



ii. 187. 

 Sebri«;ht, Sir J., on crossed animals, 



i. 23. 

 Sedgwick, Prof, on groups of spe- 

 ,cies suddenly appearing, ii. 77. 

 Seedlings destroyed by msucts, i. 



83. 

 Seeds, nutriment in, i. 94. 



, winged, i. 181. 



, moans of dissemination, i. 



240,252; ii. 146. 

 , power of resisting salt water, 



ii. 143. 



in crops and intestines of 



birds, ii. 146. 



, eaten by fish, ii. 146, 176. 



, in mud, ii. 1 75. 



, hooked, on islands, ii. 181. 



Selection of domestic products, i. 



34. 

 , principle not of recent origin, 



i. 3i). 



, unconscious, i. 39. 



, natural, i. 97. 



, sexual, i. 107. 



, objecti(ms to terra, i. 99. 



natural, has not induced steri- 



lity, ii. 20. 



Sexes, relations of, i. 108. 



Sexual characters vaiiable, i. 191. 



Selection, i. 107. 



Sheep, Merino, their selection, i. 36. 



, two sub-breeds, unintention- 

 ally produced, i. 41. 

 -, mountain varieties of, i. 93. 



Shells, culours of, i. 165. 



, hinges of, i. 240. 



, littoral, seldom embedded, ii. 



58. 



Shells, fresli-water, long retain the 



same forms, ii. 117. 

 , fresh-water, dispersal of, ii, 



173. 



, of Madeira, ii. 180. 



, land, distribution of, ii. 180. 



, land, resisting salt water, ii. 



1S7. 

 Shrew-mouso, ii. 218. 

 Silene, infertility of crosses, ii. 14. 

 Silliman, Prof., on blind rat, i. 171. 

 Siren ia, their affinities, ii. 108. 

 Sitaris, metamorphosis of, ii. 252. 

 Skulls of young mammals, i. 248 ; 



ii. 235. 

 Slave-making instinct, i. 336. 

 Smith, Col. Hamilton, on striped 



h. .rses, i. 200. 

 , Mr. Fred., on slave-making 



ants, i. 387. 

 -, on neuter ants, i. 360. 



Sniitt, Dr.. ontlie Polyzoa, i. 301. 



Snake with tooth for cuttingtlirough 

 egg-sliell, i. 33i. 



Sonierville, Lord, on selection of 

 sheep, i. 35. 



Sorbus, gratts of, ii. 19. 



So rex, ii. 218. 



Spaniel, King Charles'sbreed, i. 40. 



Specialisation of organs, i. 152. 



Species, polymorpldc, i. 54. 



, domiuaut, i. 67. 



, common, variable, i. 66. 



in large genera variable, i. 69. 



, groups of, suddenly appear- 

 ing, ii. 77, 82. 



beneath Silurian formations, 



ii. 81. 



successively appearing, ii. 89. 



clianging Mmultaneously 



throughout the world, ii. IdO. 



Spencer, Lwrd, on increase in size of 

 cattle, i. 40. 



, Herljert, Mr., on the first steps 



in dilierfntiation, i. 155. 



, on the tendency to an equili- 

 brium in all forces, ii. 29. 



Sphex, parasitic, i. 336. 



Spiders, development of, ii. 245. 



Sports in plants, i. 11. 



Sprengel, C. C, on crossing, i. 119. 

 on ray-florets, i. 180. 



Squ iljdon, ii. 108. 



