I n i ' i :•: 





Prevost, C, as candidate for R. S'' 

 Foreign List, ii. 229 ; mentioned, ii. 

 1 So 



Price, J., extract from letter from Dar- 

 win to, i. 372 



Prichard, J. C . biographical note, i. 43 ; 

 on immutability, i. 43-6; quotations 

 from his Physi tory oj Man- 



kind, i. 43-5 



tlcy, "Green matter" of, i. 140; 

 Huxley's essay on, i. 398 



Primogeniture, antagonistic to Natural 

 Selection, ii. 34 



Primrose (see also Primula), Darwin's 

 experiments on cowslip and. i. 252, 

 420; ii. 311, 324; dimorphism of, 

 ii. 327, 328; J. Scott on, ii. 324 



Primula, i. 296 ; Darwin's work on, 

 i. 211, 218, 219, 221, 298; ii. 279, 

 282, 309, 319 ; difficulty of ex; 

 menting with, ii. 353 : dimorphism 

 of, ii. 2S0, 310, 314; dimorphism 

 lost by variation, ii. 323 ; entrance 

 of pollen-tubes at chalaza, ii. 333, 3 {4 ; 

 varying fertility of, ii. 323 ; fert: 

 tion of, ii. 419; homomorphic unions 

 and, ii. 328 ; ovules of, ii. 333, 334 ; 

 J. Scott's work on, ii. 310, 321, 

 323-5 ; stamens of, ii. 293 ; P. elatior, 

 i. 252 ; ii. 372 ; P. longifiora, non- 

 dimorphism of, ii. 320 ; Treviranus 

 on, ii. 324 ; P. mollis, ii. 320 ; P. 

 seotiea, i. 221 ; ii. 316 ; P. sinensis, 

 i. 221 ; fertility of, ii. 323 ; legitimate 

 and illegitimate unions, ii. 310 ; move- 

 ment of cotyledons, ii. 415 



Principle of divergence, i. 153 



Principles of Biolqgy, Spencer's, ii. 442 



Principles of Geology, Lyell's, i. 240, 

 2 7 2 > 3°5 ; ii- 222; Darwin on, 

 i. 272; ii. 117, 222; Wallace's re- 

 view of, ii. 39 



Pringiea antiscorbutica (Kerguelen 

 cabbage), i. 4S 



Priority, Falconer and Owen on, i. 227 



Proboscidean group, extinction of, i. 207 



Progress, in forms of life and organisa- 

 tion, i. 142, 164 



Progression, tendency in organisms to- 

 wards, i. 286 



Progressive development, i. 344 : ii. 376 



Pronuba, the Yucca moth, Riley on, 

 ii. 386 



Proteacese, i. S6, 10S ; former extension 

 of, i. r 



Protean genera, list o( X. American, 

 i- 444 



Protection, colour in butterflies and, 

 i. 266 ; thorns as, i. 30S : Wallace 

 on, i. 305 ; colour and, ii. S5-7, S9 ; 



■ur of birds and, '.our 



aterpillars and, ii. 71 ; 

 shells ami, ii. 



on Sexual v and, ii. - 



lution of colour and, ii. 59 ; mim 

 and, ii. 87 ; monkeys' manes 

 ii. 91 ; Wallace on colour and, ii. 

 72-S; Wallace on wings of lepidoptera 

 and, ii. 67 



• resemblance, Wallace on, 

 ii. 72- v > 

 Pi (terogyny, in Plantago, ii. 417 

 Proihero, G. W., i. 17 ; 

 Protococcus, i. 164 

 Protozoa, i. 164, 165 



■ idential arrangement, i. 191 

 Primus laur, 



taries visited by ants, ii. 399 

 vrus, i. 262 

 Psychology, Delbceuf on, ii. 4S: 



manes' work on comparative, ii. 49 

 Ptarmigan, protective colouring of, 



ii. 87 

 Pterophorus periscelidactylus, ii. 3S6 

 Publishing, over-readiness of most men 



in, ii. 356 

 Pumilio argyrolcpis, Darwin on seeds 



of, ii. 3S7, 430 

 Purbeck, vlax from the. i. 210 



Purpose, Darwin on use of term, ii. 429 

 a, fertilisation mechanism in, i. 

 '152 



QUAGGA, hybrid between horse and, 



i. 319 

 Quails, seed-dispersal by migral 



»• 436 



Quarterly Journa. -, article 



on Darwin and his teaching in, 

 i. 267 ; review by Wallace of the 

 Duke of Argyll's Reign af 1 

 i. 281 



.'. Mivart's articl 

 5 ; ; ; Bishop Wi 

 Origin in, i. 156: article on 

 horses, and hybrids, i. 304 ; ii. . ' 



Quartz, segregation in foliate 

 ii. 20^, 206 



Qua;: J. 1 . A. de, 



phical note, i. 1S6 : letters to, i. 136, 

 1 I . 187, 201, 2 : trans- 



lation o( paper by, i. 245 : on pro- 

 portion of sexes in Bomiyx, ii, 



Quenstedt, work on the Lias by. i. 340 



Queries on expression, i. 2 



RAB1 ;. iM : skeletons of, 



i. 1S1 : ii. 210 : Darwin's w 1 



ii. 57 

 Race, nature s regard for. ii. 44 



