INDEX. 
499 
PELARGONIUM. 
Pelargonium, flowers of, 145. 
-, sterility of, 251. 
Pelvis of women, 144. 
Peloria, 145. 
Period, glacial, 365. 
Petrels, habits of, 184. 
Phasianus, fertility of hybrids, 253. 
Pheasant, young, wild, 216. 
Philippi on tertiary species in Sicily, 
312. 
Pictet, Prof., on groups of species sud¬ 
denly appearing, 302, 305. 
-, on rate of organic change, 313. 
-, on continuous succession of ge¬ 
nera, 316. 
--, on close alliance of fossils in con¬ 
secutive formations, 335. 
*-, on embryological succession, 338. 
Pierce, Mr., on varieties of wolves, 91. 
Pigeons with feathered feet and skin 
between toes, 12. 
-, breeds described, and origin of, 
2o; 
-, breeds of, how produced, 39, 42. 
—, tumbler, not being able to get 
out of egg, 87. 
-, reverting to blue colour, 160. 
■ -, instinct of tumbling, 214. 
■ -carriers, killed by hawks, 362. 
——, young of, 445. 
Pistil, rudimentary, 451. 
Plants, poisonous, not affecting certain 
coloured animals, 12. 
-, selection applied to, 32. 
——, gradual improvement of, 37. 
-not improved in barbarous coun¬ 
tries, 38. 
-destroyed by insects, 67. 
-, in midst of range, have to struggle 
with other plants, 77. 
-, nectar of, 92. 
-, fleshy, on sea-shores, 132. 
-, fresh-water, distribution of, 386. 
-, low in scale, widely distributed, 
406. 
Plumage, laws of change in sexes of 
birds, 89. 
Plums in the United States, 85. 
Pointer dog, origin of, 35. 
-, habits of, 213. 
Poison not affecting certain coloured 
animals, 12. 
EOBINIA. 
Poison, similar effect of, on animals and 
plants, 484. 
Pollen of fir-trees, 203. 
Poole, Col., on striped hemionus, 163. 
Potamogeton, 387. 
Prestwich, Mr., on English and French 
eocene formations, 328. 
Primrose, 49. 
-, sterility of, 247. 
Primula, varieties of, 49. 
Proteolepas, 148. 
Proteus, 139. 
Psychology, future progress of, 489. 
Q. 
Quagga, striped, 165. 
Quince, grafts of, 262. 
R. 
Rabbit, disposition of young, 215. 
Races, domestic, chamcters of, 16. 
Race-horses, Arab, 35. 
-, English, 356. 
Ramond on plants of Pyrenees, 368. 
Ramsay, Prof., on thickness of the 
British formations, 284. 
-, on faults, 285. 
Ratio of increase, 63. 
Rats, supplanting each other, 76. 
-, acclimatisation of, 141. 
-, blind in cave, 137. 
Rattle-snake, 201. 
Reason and instinct, 208. 
Recapitulation, general, 459. 
Reciprocity of crosses, 258. 
Record, geological, imperfect, 279. 
Rengger on flies destroying cattle, 72. 
Reproduction, rate of, 63. 
Resemblance to parents in mongrels and 
hybrids, 273. 
Reversion, law of inheritance, 14. 
—— in pigeons to blue colour, 160. 
Rhododendron, sterility of, 251. 
Richard, Prof., on Aspicarpa, 417. 
Richardson, Sir J., on structure of 
squirrels, 180. 
-, on fishes of the southern hemi¬ 
sphere, 376. 
Robiiiia, grafts of, 262« 
