Seite - 549 - in The Origin of Species

INDEX 549 Pigeons, young of, 485. Pigs, black, not affected by the paint-root, 30. , modified by want of exercise, 209. Pistil, rudimentary, 491. Plants, poisonous, not affecting cer- tain coloured animals, 30. , selection applied to, 51. , gradual improvement of, 51. , not improved in barbarous countries, 51. • , dimorphic, 61. , destroyed by insects, 84. in midst of range, have to struggle with other plants, 97. , nectar of, 106. , fleshy, on sea-shores, 146. , climbing, 196, 252. , fresh-water, distribution of, 429 , low in scale, widely distrib- uted, 446. Pleuronectidae, their structure, 240. Plumage, laws of change in sexes of birds, :o2. Plums in the United States, 98. Pointer dog, origin of, 49- - —— , habits of, 269. Poison not affecting certain col- oured animals, 30. -, similar effect of, on animals and plants, 523. Pollen of fir-trees, 215. transported by various means, 203, 204, 211. Pollinia, their development, 251. Polyzoa, their avicularia, 249. Poole, Col., on striped hemionus, 173- Potamogcton, 430. Pouchet, on the colours of flat-fish, 243- Prestwich, Mr., on English and French eocene formations, 377. Proctotrupes, 189. Proteolepas, 159. Proteus, 152. Psychology, future progress of, 527. Prygoma, found in the chalk, 357. Quagga, striped, 174. Quatrefages, M., on hybrid moths, 304- Quercus, variability of, 67. Quince, grafts of, 311. R Rabbits, disposition of young, 269. Races, domestic, characters of, 33. Race-horses, Arab, 50. , English, 403. RadclifFe, Dr., the electrical organs of the torpedo, 198. Ramond, oix plants of Pyrenees, 413- Ramsay, Prof., on subaerial denu- dation, 337. , on thickness of the British formations, 338. , on faults, 338. , Mr., on instincts of cuckoo, 272. Ratio of increase, 79. Rats supplanting each other, 90. , acclimatisation of, 153. , blind, in cave, 150. Rattle-snake, _ 2 1 3. Reason and instinct, 262. Recapitulation, general, 499. Reciprocity of crosses, 308. Record, geological, imperfect, 333. Rengger, on flies destroying cattle, 86. Reproduction, rate of, 80. Resemblance, protective, of insects, 23s. to parents m mongrels and hybrids, 329. Reversion, law of inheritance, 32. , in pigeons, to blue colour, 170. Rhododendron, sterility of, 303, 304. Richard, Prof., on Aspicarpa, 455. Richardson, Sir J., on structure of squirrels, 185. , on fishes of the southern hemisphere, 421. Robinia, grafts of, 311. Rodents, blind, 149. Rogers, Prof., Map of N. America, 345- Rudimentary organs, 491. Rudiments important for classifica- tion, 4SS. Riitimeyer, on Indian cattle, 36, 305. S Salamandra atra, 491. Saliva used in nests, 289. Salvin, Mr., on the beaks of ducks, 238. Sageret, on grafts, 311. Salmons, males fighting, and hooked jaws of, 101. Salt water, how far injurious to seeds, 405, 406. not destructive to land-shells, 438, 439. Salter, Mr., on early death of hy- brid embryos, 315. Saurophagus sulphuratus, 187. Scliacht, Prof., on Phyllotaxy, 225. Schiodte, on blind insects, 150. , on flat-fish, 240. Schlegel, on snakes, 156. SchobI, Dr., on the ears of mice, 223. Scott, J., Mr., on the self-sterility of orchids, 303.