534 



INDEX. 



Reciprocity of crosses, 287. 



Record, geological, imperfect, 312. 



Rengger, on Hies destroying cat- 

 tle, 67. 



Reproduction, rate of, 60. 



Resemblance, protective, of in- 

 sects, 215. 



to parents in mongrels and 



livbrids, 306. 



Reversion, law of inheritance, 13. 



, in pigeons, to blue color, 



151. 



Rhododendron, sterility of, 282. 



Richard, Prof., on Aspicarps, 433. 



Richardson, Sir J., on structure 

 of squirrels, 165. 



, on fishes of the southern 



hemisphere, 399. 



Robinia, grafts of, 290. 



Rodents, blind, 130. 



Rogers, Prof., Map of N. America, 

 324. 



Rudimentary organs, 467. 



Rudiments important for classi- 

 fication, 432. 



Rutimeyer, on Indian cattle, 16, 

 284. 



Salamandre atra, 468. 

 Saliva used in nests, 269. 

 Salvin, Mr., on the beaks of 



ducks, 218. 

 Sageret, on grafts, 290. 

 Salmons, males fighting, and 



hooked jaws of, 81. 

 Salt water, how far injurious to 



seeds, 383. 

 not destructive to land-shells, 



417. 

 Salter, Mr., on early death of 



hybrid embryos, 293. 

 Saurophagus sulphuratus, 168. 

 Schacht, Prof., on Phyllotaxy, 



205. 

 Schiodte, on blind insects, 131. 



, on flat-fish, 220. 



Schlegel, on snakes, 137. 

 Schobl, Dr., on the ears of mice, 



203. 

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



of orchids, 281. 



Scott, J., Mr., on the crossing of 

 varieties of verbascum, 304. 



Sea- water, how far injurious to 

 seeds, 383. 



not destructive to land-shells, 



417. 



Seabright, Sir J., on crossed ani- 

 mals, 18. 



Sedgwick, Prof., on groups of 

 species suddenly appearing, 333. 



Seedlings destroyed by insects, 63. 



Seeds, nutriment in, 71. 



, winged, 139. 



, means of dissemination, 183, 



191, 385. 



, power of resisting salt 



water, 383. 

 -, in crops and intestines of 



birds, 386. 

 — , eaten by fish, 386, 408. 

 — , in mud, 408. 



-, hooked, on islands, 413. 



Selection of domestic products, 

 25. 



, principle not of recent ori- 

 gin, 29. 

 -, unconscious, 29. 



, natural, 73. 



, sexual, 81. 



, objections to term, 74. 



natural, has not induced 



sterility, 291. 



Sexes, relations of, 81. 



Sexual characters variable, 146. 



, selection, 81. 



Sheep, Merino, their selection, 27. 



, two sub-breeds, uninten- 

 tionally produced, 31. 

 -, mountain varieties of, 70. 



Shells, colors of, 127. 

 -, hinges of, 182. 



, littoral, seldom embedded, 



319. 

 Shells, fresh- water, long retain 



the same forms, 364. 

 , fresh-water, dispersal of, 



406. 



, of Madeira, 412. 



, land, distribution of, 412. 



land, resisting salt water, 



417. 



