PorrEAC. 



INDEX. 



PROCYON. 



477 



Poiteau, origin of Cytisus adami, i. 

 416 ; origin of cultivated varieties of 

 fruit-trees, ii. 247. 



Polish fowl, i. 239, 262, 266, 269, 270, 

 275; skull figured, i. 275; section of 

 skull figured, i. 277 ; development of 

 protuberance of skull, i. 262 ; fur- 

 culum figured, i. 282. 



Polish, or Himalayan rabbit, i. 112. 



Pollen, ii. 356, 357 ; action of, ii. 

 86 ; injurious action of, in some 

 orchids, ii. 115,116; resistance of, 

 to injurious treatment, ii. 148 ; pre- 

 potency of, ii. 171. 



Pollock, Sir F., transmission of varie- 

 gated leaves in Ballota nigra, i. 409 ; on 

 local tendency to variegation, ii. 263. 



Polyanthus, i. 464. 



Polydactylism, inheritance of, i. 457- 

 459 ; significance of, i. 460. 



Ponies, most frequent on islands and 

 mountains, i. 54 ; Javanese, i. 56. 



Poole, Col., on striped Indian horses, i. 

 61, 62; on the young of Asinus ia- 

 dicus, ii. 17. 



Poplar, Lombard}', i. 385. 



Poppig, on Cuban wild dogs, i. 28. 



Poppy, found in the Swiss lake-dwell- 

 ings, i. 335, 337 ; with the stamens 

 converted into pistils, i. 389 ; differ- 

 ences of the, in different parts of 

 India, ii. 149 ; monstrous, fertility of, ii. 

 150 ; black-seeded, antiquity of, ii. 425. 



Porcupine, breeding of, in captivity, 

 ii. 135. 



Porcupine family, L 448, ii. 53. 



Porphyrio, breeding of a species of, in 

 captivity, ii. 140. 



Portal, on a peculiar hereditary affec- 

 tion of the eye, i. 454. 



Porto Santo, feral rabbits of, i. 117. 



Portulaca oleracea, ii. 275. 



Potamochcerus penicillatus, ii. 133. 



Potato, i. 350, 351 ; bud-variation by 

 tubers in the, i. 410, 411; graft- 

 hybrid of, by union of half-tubers, i. 

 420 ; individual self-impotence in the, 

 ii. 118; sterility of, ii. 153; advan- 

 tage of change of soil to the, ii. 128. 



Potato, sweet, sterility of the, in 

 China, ii. 153; varieties of the, 

 suited to different climates, ii. 299. 



Pouchet, M., his views on plurality of 

 races, i. 2. 



Pouter pigeons, i. 143-145 ; furculum 

 figured, i. 176 ; history of, i. 217. 



Powis, Lord, experiments in crossing 

 humped and English cattle, i. 86, ii. 

 19. 



Poynter, Mr., on a graft-hybrid rose, 

 i. 419. 



Prairie wolf, i. 22. 



Precocity of highly-improved breeds, 

 ii. 313. 



Prepotency of pollen, ii. 171. 



Prepotency of transmission of charac- 

 ter, ii. 40, 158; in the Austrian 

 emperors and some Roman families, 

 ii. 40 ; in cattle, ii. 40, 41 ; in sheep, 

 ii. 41 ; in cats, ibid. ; in pigeons, ii. 41, 

 42 ; in fowls, ii. 42 ; in plants, ibid. ; in 

 a variety of the pumpkin, i. 380; 

 in the jackal over the dog, ii. 43 ; in 

 the ass over the horse, ibid. ; in the 

 pheasant over the fowl, ibid. ; in the 

 penguin duck over the Egyptian 

 goose, ii. 44 ; discussion of the phe- 

 nomena of, ii. 44—47. 



Prescott, Mr., on the earliest known 

 European flower-garden, ii. 202. 



Pressure, mechanical, a cause of 

 modification, ii. 336, 337. 



Prevost and Dumas, on the employ- 

 ment of several spermatozoids to fer- 

 tilise one ovule, ii. 356. 



Preyer, Prof., on the effect of circum- 

 cision, i. 467. 



Price, Mr., variations in the structure 

 of the feet in horses, i. 52. 



Prichard, Dr., on polydactylism in the 

 negro, i. 458 ; on the Lambert family, 

 ii. 53; on an albino negro, ii. 214; 

 on Plica polonica, ii. 266. 



Primrose, i. 464; double, rendered 

 single by transplantation, ii. 151. 



Primula, inter-crossing of species of, i. 

 356 ; contabescence in, ii. 150 ; ' hose 

 in hose,' i. 389 ; with coloured 

 calyces, sterility of, ii. 149. 



Primula sinensis, variations, i. 394: ii. 

 324; reciprocally dimorphic, ii. 113. 



Primula veris, i. 464, ii. 87. 



Primula vulgaris, i. 464, ii. 87. 



Prince, Mr., on the inter-crossing of 

 strawberries, i. 374. 



Pringsheim, on conjugation, ii. 352. 



Proci/on, sterility of, in captivity, ii. 

 134. 



