492 



INDEX 



theory of heredity and, i. 360 ; evi- 

 dence from hybridisation in favour 

 of, i. 280 ; Hooker on, i. 301 ; Hux- 

 ley's views on, i. 287 ; Jager on, 

 i. 371; Lyellon, i. 301 ;and molecular 

 hypothesis of Hackel, i. 364 ; Ran- 

 yard on, i. 302 ; Romanes on, i. 363 ; 

 self-fertilisation and, i. 303 ; Wallace 

 on, i. 300-302 ; ii. 71 ; the idea a 

 relief to Darwin as connecting facts, 

 ii. 371 ; F. Miiller and, ii. 82, 356 ; 

 bearing on regeneration, ii. 427 ; 

 "will turn out true someday," ii. 

 359 ; _mentioned, i. 296, 357 



Panmixia, i. 352 



Panniculus carnosus in man, ii. 39 



Papilio Menmon, Wallace on, i. 266 ; 

 P. nireus, Mrs. Barber on, ii. 403 ; 

 P. pammon, Wallace on, i. 266 



Papilionaceous flowers, absence in New 

 Zealand, ii. 255 ; and hermaphrodi- 

 tism, ii. 253 



Papilionidse, Wallace on Malayan, 

 i. 265 



Paraheliotropism, Miiller's observa- 

 tions on, ii. 366 ; in Phyllanthus t 

 ii. 364, 365 



Parallel Roads of Glen Roy, ii. 171-93 

 (see Glen Roy) 



Parana, Darwin finds Mastodon at, 

 ii. 361 



Pararge, breeding in confinement, ii. 96 



Parasites, and degeneration, i. 164 ; 

 extermination of game by, i. 165 ; 

 bloom as protection against, ii. 411 ; 

 and galls, ii. 425-7 



Parietaria, explosive stamens of, ii. 375 



Parrots, as agents in seed-dispersal, 



ii- 349 

 Parsimony, Hamilton's law of, i. 370 



Parthenogenesis, Darwin on, i. 103 ; 

 Owen's Hunterian lecture on, i. 102 ; 

 in Primula^ i. 221 ; J. Scott's work 

 on, ii, 309 



Partridges, as agents of seed-dispersal, 

 i. 436 ; rudimentary spurs on legs of, 

 ii. 64 



Parns caruleus, protective colouring, 

 of, ii. 85 



Passiftora, i. 219 ; bloom experiments 

 on, ii. 371 ; Lord Farrer's work on, 

 ii 357> 383 5 position of flowers 

 of, ii. 383 ; Miiller assists Lord 

 Farrer in work on, ii. 358 ; Scott's 

 work on, ii. 314, 316, 323, 325; 

 self-sterility of, ii. 314 ; Sprengel on, 

 ii. 380 ; visited by humming-birds, 

 ii. 383 ; P. gracilis, dispersal of seeds, 

 ii. 348 ; P. princeps, adapted to hum- 

 ming birds, ii. 383 



Patagonia, i. II, 19, 22; ii. 288 ; L. 

 Agassiz on elevation of, ii. 164 ; Dar- 

 win on geology of, ii. 1 19,121; gigantic 

 land-sloth of, ii. 361 ; Admiral Suli- 

 van on, ii. 234 



Pathology, Paget's lectures on, ii. 106, 



425 

 Pattison, Mark, ii. 442 



Pavo nigripennis, ii. 70 



Payne, on effect of rain on plants, ii. 

 409, 410 ; observations by, ii. 394 



Peaches, bud-variation in, i. 276 ; raised 

 from seed, i. 279 



Peacock, evolution and Sexual Selec- 

 tion of, ii. 58 ; experiments on cutting 

 tail of male, ii. 65 ; muscles of tail 

 of, ii. 1 06 



Pearson, H. H. W., on the botany of 

 Ceylon patanas, i. 145 



Peas, course of vessels in ovary of 

 sweet-, ii. 289 ; crossing in, ii. 250, 

 257 ; fertilisation of, ii. 388, 389 ; 

 waxy secretion in, i. 409 



Pecten, i. 26 ; P. latissiimis, i. 54 



Pelargonium, peloric, i. 148, 219 ; ii. 

 298 ; Beaton on, ii. 297 ; Darwin's 

 experiments on, ii. 297, 298 ; flowers 

 of, ii. 256, 298 ; P. multiflora alba, 

 Darwin's experiments on crossing, ii. 

 298 



Pelobius, Darwin on, ii. 63 



Peloria, i. 148, 219; effect of pollen 

 on regular flowers, i. 219; Darwin 

 suggests experiments on, ii. 323 ; 

 Masters on, ii. 334, 335 ; in Pelar- 

 gonium, ii. 298 ; inheritance of, ii. 359 



Peneus, F. Miiller on, i. 264 



Pentateuch, N. Lewy on, i. 365 



Periodicals, Darwin's opinion of scien- 

 tific, i. 317; foreign compared with 

 English, i. 55 



Peripatus, Moseley's work on, i. 365 



Peristylus viridis, Lord Farrer's obser- 

 vations on, ii. 373 



Permanence of ocean basins, ii. 146, 147 



Permian period, glacial action during, 

 i. 173; ii. 154; freshwater beds in 

 India, ii. 15, 16 



Personal Narrative, Humboldt's, i. 263 



Peru, anarchy in, i. 25, 27 ; Darwin on 

 terraces in, ii. 119; D. Forbes on 

 geology of, ii, 141, 144 



Peuquenes Pass, Darwin visits, i. 21 



Pfeffer, Prof., on chemotaxis, ii. 343 ; 

 considers \Viesner wrong in some 

 of his interpretations, ii. 370 ; on 

 Drosera, ii. 267, 400 ; Periodische 

 Bewegungen, ii. 249 



Pfitzer, on classification of orchids, ii. 

 281 



