PLEURONECTID^. 



INDEX. 



EArROPHAGUS. 



335 



Pleuronectidse, their structure, i. 



290. 

 Plum.is::e, laws of change in sexes 



of binls, i. 109. 

 Plums in tlie United States, i. 104. 

 Poiuter dr^g, origin of, i. 40. 



, habits of, i. 327. 



Poison not aifecting certain coloured 



animals, i. 13. 

 , similar effect of, on animals 



and jilants, ii. 299. 

 Pollen of fir-trees, i. 257. 

 ' transported by various means, 



i. 241, 252. 

 PoUinia, their development, i. 304. 

 Polyzoa, their aviculuria, i. 301. 

 Poole, Col., on striped hemionus, 



i. 202. 

 Potemogeton, ii. 175. 

 Poucht t, on the colours of fiat-fish, 



i. 293. 

 Prestwich, Mr., on English and 



Frencii eocene formations, ii. 105. 

 Pro toirupes, i. 222. 

 Pioteolcpas, i. 183. 

 Proteus, i. 173. 

 Psychology, future progress of, ii. 



304. 

 Pyrgoma, found in the chalk, ii. 81. 



Q. 



Quag2a, striped, i. 201. 

 Quatrefages, M., on hybrid moths, 



n. 9. 

 Quercus, variability of, 1. 62. 

 Quince, grafts of, ii. 18. 



E. 



Eabbits, disposition of young, 1. 

 328. 



Races, domestic, characters of, i. 18. 



Race-horses, Arab, i. 40. 



, English, ii. 140. 



Radcliffe, Dr., the electrical organs 

 of the torpedo, i. 2o4. 



Riiraoiid, on plants of Pyrenees, ii. 

 153. 



Bamsay, Prof., on subacrial denu- 

 dation, ii. 53. 



• , on tliickaces of the British 



formations, ii. 55, 56. 



" J on faults, ii. 55. 



Ramsav, 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 cros.ses, 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, \g 

 16. 



, in pigeons, to blue colour, i. 



198. 



Rhododendron, sterility of, ii. 7, 8. 



Richard, Prof., on Aspiearps, ii. 209. 



Richardson, Sir J., on structure of 

 squirrels, i. 216. 



, on fishes of the southern hemi- 

 sphere, ii. 164. 



Robiiiia, grafts of, ii. 19. 



Ro(h;nts, blind, i. 170. 



Rogers, Prof., Map of N. America, 

 ii. (J5. 



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 nrsts, i. 355. 

 Salvin, Mr., on the beaks of ducks, 



i. 287. 

 Sageret, on grafts, ii. 18. 

 Sal mons, males fighting, und hooked 



jaws of, i. 108. 

 Salt water, how far injurious to 



seeds, ii. 142. 

 not destructive to land-shells, 



ii. 187. 

 Salti r, Mr., on early death of hybrid 



embryos, ii. 23. 

 Sam'ophagus sulphuratus, i. 220. 



