408 



INDEX. 



PENGUIN. 



Penguin, wing of, ii. 214. 

 Pentateuchal cosmogony, ii. 187. 

 Personal appearance and habits, i. 109, 



in. 

 Petals, fertilisation of flowers by insects 



which gnaw the, iii. 285. 

 Petrels, nestling, with exotic seeds in 



their crops, ii. 147, 148. 

 Pheasant, female, coloration of the, 



iii. 124. 



Philadelphia, Academy of Natural 

 Sciences of, election of C. Darwin a 

 correspondent of, ii. 307. 

 Phillips, Professor John, ' Life on the 

 Earth,' ii. 349, 358, 373. 



note on, ii. 309 note ; lectures 



at Cambridge, ii. 309, 315. 

 Philosophical Club, ii. 42. 

 Phpcce, descended from a terrestrial 



Carnivore, iii. 163. 



Photograph-albums received from Ger- 

 many and Holland, iii. 225. 

 Phyllotaxy, iii. 51, 52. 

 Physical conditions, constancy of species 

 under diversity of, ii. 319 ; effects of, 

 ii. 320 ; increasing belief in the direct 

 action of, ii. 390. 

 Physicians, Royal College o r , award of 



the Baly medal by the, iii. 224. 

 Physiological Society, establishment of 



the, iii. 204. 

 Physiology, importance of vivisection 



in the study of, iii. 202, 205. 

 Pictet, Professor F. J., partial agree- 

 ment with Darwin, ii. 184; review 

 of the ' Origin ' in the ' Bibliotheque 

 Universelle,' ii. 297. 

 Pictures, taste for, acquired at Cam- 

 bridge, i. 49. 



Picus, special adaptation of, iii. 158. 

 Pigeon-fanciers, ii. 281. 

 Pigeon-fancying, ii. 48, 51. 

 Pigeons, ii. 46 ; importance of work 

 on, ii. 84 ; modification of nasal 

 bones in, ii. 378 ; vertebrae of, ii. 

 350; wing-bars of, ii. 112. 

 Pigs, black, in the Everglades of Vir- 

 ginia, ii. 300. 



Finguicul&i power of movement of the 

 leaves of, iii. 324; digestion in, iii. 



324- 

 " Pipes " in the chalk, ii. 332. 



POLLEN. 



Pithing of lassoed cows, by theGauchos 

 of La Plata, iii. 245. 



PlanaricE, Terrestrial, ii. 36 ; mimetic 

 coloration of, iii. 71. 



Planorbis, Professor Weismann on the 

 species of, in the freshwater limestone 

 of Steinheim, iii. 156. 



Plantago, two forms of, iii. 305. 



Plants, American Alpine, ii. 6 1 ; angi- 

 ospermous, in cretaceous beds of the 

 United States, iii. 248 ; Antarctic 

 fossil, ignorance of, iii. 247 ; Arctic 

 fossil, importance of, iii. 247 ; Aus- 

 tralian, iii. 248 ; British Terrestrial 

 and Aquatic, sexual characteristics- 

 of, iii. 304 ; causes of variability in, 

 iii. 342-346 ; climbing, i. 92 ; iii. 

 311-317; garden, difficulty of nam- 

 ing, iii. 269 ; heterostyled, poly- 

 gamous, dioecious and gynodioecious, 

 iii. 295 ; higher, impulse to the 

 development of, given by flower- 

 frequenting insects, iii. 248 ; insec- 

 tivorous, i. 96 ; in the Silurian, iii. 

 248 ; lignite, of Kerguelen Land, iii. 

 247 ; mimetic, iii. 70 ; naturalised 

 in Australia, ii. 259 ; power of move- 

 ment in, i. 98 ; iii. 329-338 ; protean 

 or polymorphic forms of, iii. 188 ; 

 self-impotent, iii. 75 ; supposed 

 movement of, from the north, iii. 

 247 ; sudden development of the 

 higher, iii. 248. 



Platanthera Hookeri and hyperborea^, 

 fertilisation of, iii. 272 note. 



Platysma muscle, contraction of, under 

 feeling of horror, iii. 142, 143. 



Pleasurable sensations, influence of, in 

 Natural Selection, i. 310. 



Plinian Society, i. 39. 



Pliocene clima'e, ii. 135. 



Poetry, taste for, i. 33 ; failure of tasts 



for, i. loo. 



Poinsettia, nature of petals of, iiL 

 285. 



Poisons, experiments with, on Drosera, 

 iii. 319, 323. 



Pollen, conveyance of, by the wings ot 

 butterflies and moths, iii. 284. 



, differences of the, in the two* 



forms of cowslip, iii. 297, 298 ; in 

 the two forms of Primrose, iii. 298, 



