PLEURONEcrnm 



INDEX. 



EArEOPHAGUS. 



335 



Pleuronectidse, their structure, i. 



290. 

 Plumage, laws of change in sexes 



of birds, i. 109. 

 Plums in the United States, i. 104. 

 Pointer dog, origin of, i. 40. 



, habits of, i. 327. 



Poison not affecting certain coloured 



animals, i. 13. 

 , similar effect of, on animals 



and plants, ii. 299. 

 Pollen of fir-trees, i. 257. 

 transported by various means, 



i. 241, 252. 

 Po'ilinia, their development, i. 304. 

 Polyzoa, their avicularia, i. 301. 

 Poole, Col., on striped hemionus, 



i. 202. 

 Potemogeton, ii. 175. 

 Pouchet, on the colours of flat-fish, 



i. 293. 

 Presrwich, Mr., on English and 



Frenci: eocene formations, ii. 105. 

 Pro totrupeo, i. 222. 

 Pioteolepas, i. 183. 

 Proteus, i. 173. 

 Psychology, future progress of, ii. 



304. 

 Pyrgoma, found in the chalk, ii. 81. 



Q. 



Quagga, striped, i. 201. 

 Quatrefages, M., on hybrid moths, 



ii. 9. 

 Qnercus, variability of, i. 62. 

 Quince, grafts of, ii. 18. 



R. 



Rabbits, disposition of young, i 

 328. 



Ra<-es, domestic, characters of, i. 18. 



Kuce-lmrses, Arab. i. 40. 



, English, ii. 140. 



Radcliffe, Dr., the electrical organs 

 of the torpedo, i. 234. 



Ramond, on plants of Pyrenees, ii. 

 153. 



Ramsay, Prof., on subacrial denu- 

 dation, ii. 53. 



■ , on thickness of the British 



formations, ii. 55, 56. 



. on faults, ii. 55. 



Ramsay, Mr., on instincts of cuckoo, 

 i. 333. 



Ratio of increase, i. 79. 



Rats supplanting each other, i. 93. 



, acclimatisation of, i. 175. 



— — , blind, in cave, i. 171. 



Rattle-snake, i. 254. 



Reason and instinct, i. 319. 



Recapitulation, general, ii. 267. 



Reciprocity of crosses, ii. 14. 



Record, geological, imperfect, ii. 48. 



Rengger, on flies destroying cattle, 

 i. 89. 



Reproduction, rate of, i. 79. 



Resemblance, protective, of insects, 

 i. 283. 



to parents in mongrels and 



hybrids, ii. 41. 



Reversion, law of inheritance, i. 

 16. 



, in pigeons, to blue colour, i. 



198. 



Rhododendron, sterility of, ii. 7, 8. 



Richard, Prof., on Aspicarps, ii. 209. 



Richardson, Sir J., on structure of 

 squirrels, i. 216. 



, on fishes of the southern hemi- 

 sphere, ii. 164. 



Robinia, grafts of, ii. 19. 



Rodents, blind, i. 170. 



Rogers, Prof., Map of N. America, 

 ii. 65. 



Rudimentary organs, ii. 255. 



Rudiments important for classifica- 

 tion, ii. 207. 



Riitimeyer, on Indian cattle, i. 21 ; 

 ii. 10. 



S. 



Salamandra atra, ii. 256. 

 Saliva used in nests, i. 355. 

 Salvin, Mr., on the beaks of ducks, 



i. 287. 

 Sageret, on grafts, ii. 18. 

 Salmons, males fighting, and hooked 



jaws of, i. 108. 

 Salt water, how far injurious te 



seeds, ii. 142. 

 not destructive to land-shells, 



ii. 187. 

 Salter, Mr., on early death of hybrid 



embryos, ii. 23. 

 Saurophagus sulphuratus, i. 220. 



