INDEX 



451 



Parus major, 165. 

 Passiflora, 225. 

 Peaches in United States, 77. 

 Pear, grafts of, 235. 

 Pelargonium, flowers of, 132. 



sterility of, 226. 



Pelris of women, 130. 

 Peloria, 132. 

 Period, glacial, 328. 

 Petrels, habits of, 166. 

 Phasianus, fertility of hybrids, 



227. 

 Pheasant, young, wild, 194. 

 Philippi on tertiary species in 



Sicily, 280. 

 Pictet, Prof. , on groups of species 



suddenly appearing, 271, 273. 



on rate of organic change, 



281. 



on continuous succession of 



genera, 284. 

 on close alliance of fossils in 



consecutive formations, 301. 

 on embryological succession, 



303. 

 Pierce, Mr., on varieties of wolves, 



83. 

 Pigeons with feathered feet and 



skin between toes, 11. 



breeds described, and origin 



of, 19. 



breeds of, how produced, 36, 



38. 



tumbler, not being able to 



get out of egg, 79. 



reverting to blue colour, 144. 



instinct of tumbling, 192. 



carriers, killed by hawks, 



325. 



young of, 400. 



Pistil, rudimentary, 405. 

 Plants, poisonous, not affecting 

 certain coloured animals, 11. 



selection applied to, 30. 



— — gradual improvement of, 34. 



not improved in barbarous 



countries, 35. 



destroyed by insects, 63. 



in midst of range, have to 



struggle with other plants, 71. 



nectar of, 83. 



fleshy, on sea-shores, 120. 



fresh-water, distribution of, 



347. 



low in scale, widely dis- 

 tributed, 364. 



Plumage, laws of change in sexes 



of birds, 81. 

 Plums in the United States, 77. 

 Pointer dog, origin of, 32. 



habits of, 193. 



Poison not affecting certain 



coloured animals, 11. 



similar effect of, on animals 



and plants, 435. 



Pollen of fir-trees, 182. 



Poole, Col., on striped hemionus, 



149. 

 Potamogeton, 348. 

 Prestwich, Mr., on English and 



French eocene formations, 294. 

 Primrose, 46. 



sterility of, 222. 



Primula, varieties of, 46. 



Proteolepas, 134. 



Proteus, 126. 



Psychology, future progress of, 



439. 



Quagga, striped, 148. 

 Quince, grafts of, 235. 



Rabbit, disposition of young, 193. 



Races, domestic, characters of, 14. 



Race-horses, Arab, 33. 



EngliBh, 320. 



Ramond on plants of Pyrenees, 

 330. 



Ramsay, Prof., on thickness of 

 the British formations, 254. 



on faults, 255. 



Ratio of increase, 59. 



Rats, supplanting each other, 70. 



acclimatisation of, 128. 



blind, in cave, 125. 



Rattle-snake, 180. 



Reason and instinct, 187. 



Recapitulation, general, 413. 



Reciprocity of crosses, 231. 



Record, geological, imperfect, 250. 



Rengger on flies destroying cattle, 

 67. 



Reproduction, rate of, 59. 



Resemblance to parents in mon- 

 grels and hybrids, 245. 



Reversion, law of inheritance, 13. 



in pigeons to blue colour, 



144. 



Rhododendron, sterility of, 22 5. 

 Richard, Prof., on Aspicarpa, 376. 

 Richardson, Sir J., on structure 

 of squirrels, 162. 



