OWEN. 



INDEX. 



POUCH ET. 



427 



Owen, Prof., on the swim-bladder of 

 fishes, 138. 



, on fossil horse of La Plata, 



276. 



, on generalized form, 283. 



, on relation of ruminants and 



pachyderms, 283. 



, on fossil birds of New Zea- 

 land, 291. 



, on succession of types, 292. 



, on affinities of the dugong, 



343. 



, on homologous organs, 359. 



, on the metamorphosis of ce- 



phalopods, 366. 



P. 



Pacific Ocean, faunas of, 298. 

 Pacini, on electric organs, 141. 

 Paley, on no organ formed to give 



pain, 152. 



Pallas, on the fertility of the domes- 

 ticated descendants of wild stocks, 



225. 



Palm with hooks, 148. 

 Papaver bracteatum, 162. 

 Paraguay, cattle destroyed by flies, 52. 

 Parasites, 200, 201. 

 Partridge, with ball of earth attached 



io foot, 308. 

 Parts greatly developed, variable, 



111. 



Parus major, 132. 

 Passiflora, 223. 

 Peaches in United States, 62. 

 Pear, grafts of, 230. 

 Pedicellaria), 179. 

 Pelargonium, flowers of, 108. 



, sterility of, 223. 



Pelvis of women, 107. 



Peloria, 108. 



Period, Glacial, 310. 



Petrels, habits of, 133. 



Phasianns, fertility of hybrids, 224. 



Pheasant, young, wild, 197. 



Pictet, Prof., on groups of species 



suddenly appearing, 264. 

 , on rate of organic change, 272, 



273. 

 , on continuous succession of 



genera, 274. 

 , on change in latest tertiary 



forms, 261. 

 , on close alliance of fossils in 



consecutive formations, 288. 



Pictet, Prof., on early transitional 



links, 265. 



Pierce, Mr., on varieties of wolves, 66. 

 Pigeons with feathered feet and skin 

 between toes, 9. 



, breeds described, and origin of, 



14. 



, breeds of, how produced, 26, 



27, 28. 



, tumbler, not being able to get 



out of egg, 63. 

 , reverting to blue colour, 118. 



, instinct of tumbling, 196. 



, young of, 368. 



Pigs, black, not affected by the 

 paint-root, 9. 



, modified by want of exercise, 



149. 



Pistil, rudimentary, 373. 

 Plants, poisonous, not affecting cer- 

 tain coloured animals, 9. 



, selection applied to, 25." 



, gradual improvement of , 25, 26. 



, not improved in barbarous 

 countries, 26. 



, dimorphic, 33, 236. 



, destroyed by insects, 49. 



, in midst of range, have to 



struggle with other plants, 56. 



, nectar of, 67, 68. 



, fleshy, on sea-shores, 99. 



, climbing, 138, 183. 



, fresh-water, distribution of, 



324. 



, low in scale, widely distri- 

 buted, 337. 



Pleuronectidse, their structure, 174. 

 Plumage, laws of change in sexes of 



birds, 65. 



Plums in the United States, 61. 

 Pointer dog, origin of, 24. 



, habits of, 196. 



Poison not affecting certain coloured 



animals, 9. 

 , similar effect of, on animals 



and plants, 399. 

 Pollen of fir-trees, 153. 



transported by various means, 



144, 145, 151. 



Pollinia, their development, 182. 

 Polyzoa, their avicularia. 181. 

 Poole, Col., on striped hemionus, 



121. 



Potamogeton, 325. 

 Pouchet, on the colours of flai-nVu, 

 175. 



IS 



