INDEX 



495 



Prevost, C., as candidate for R. Society 

 Foreign List, ii. 229 ; mentioned, ii. 

 1 80 



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 Physical History of Man- 

 kind, i. 43-5 



Priestley, "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 experi- 

 menting with, ii. 353 ; dimorphism 

 of, ii. 280, 310, 314; dimorphism 

 lost by variation, ii. 323 ; entrance 

 of pollen-tubes at chalaza, ii. 333, 334; 

 varying fertility of, ii. 323 ; fertilisa- 

 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. longijlora, non- 

 dimorphism of, ii. 320 ; Treviranus 

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

 scotica, 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 Biology, Spencer's, ii. 442 



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

 2 7 2 J 35 > " 222 J Darwin on, 

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

 view of, ii. 39 



Pringlea antiscorbutica (Kerguelen 

 cabbage), i. 48 



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 Yttcca moth, Riley on, 

 ii. 386 



Proteaceae, i. 86, 108 ; former extension 

 of, i. 380 



Protean genera, list of N. American, 

 i. 444 



Protection, colour in butterflies and, 

 i. 266 ; thorns as, i. 308 ; Wallace 

 on, i. 305 ; colour and, ii. 85-7, 89 ; 



colour of birds and, ii. 60,85 5 colour 

 of caterpillars and, ii. 71 > colour of 

 shells and, ii. 95 ; Darwin's views 

 on Sexual Selection and, ii. 84 ; evo- 

 lution of colour and, ii. 59 ; mimicry 

 and, ii. 87 ; monkeys' manes as, 

 ii. 91 ; Wallace on colour and, ii. 

 72-8; Wallace on wings of lepidoptera 

 and, ii. 67 



Protective resemblance, Wallace on, 

 ii. 72-8 



Proterogyny, in Plantago, ii. 417 



Prothero, G. W., i. 174 



Protococcus, i. 164 



Protozoa, i. 164, 165 



Providential arrangement, i. 191 



Primus laurocerasus, extra- floral nec- 

 taries visited by ants, ii. 399 



Psithyrus, i. 262 



Psychology, Delbceuf on, ii. 48; Ro- 

 manes' work on comparative, ii. 49 



Ptarmigan, protective colouring of, 

 ii. 87 



Pterophorus periscelidactylus, ii. 386 



Publishing, over-readiness of most men 

 in, ii. 356 



Pumilio argyrolepis, Darwin on seeds 

 of, ii. 387, 430 



Purbeck, Plagiaulax from the, i. 210 



Purpose, Darwin on use of term, ii. 429 



Pyrola, fertilisation mechanism in, i. 



QUAGGA, hybrid between horse and, 



i- 319 



Quails, seed-dispersal by migratory, 



i. 436 



Quarterly Journal of Science, article 

 on Darwin and his teaching in, 

 i. 267 ; review by Wallace of the 

 Duke of Argyll's Reign af Law, 

 i. 281 



Quarterly Review, Mivart's article, i. 

 333 ; Bishop Wilberforce's review of 

 Origin in, i. 156 ; article on zebras, 

 horses, and hybrids, i. 364 ; ii. 359 



Quartz, segregation in foliated rocks, 

 ii. 205, 206 



Quatrefages, J. L. A. de, biogra- 

 phical note, i. 186 ; letters to, i. 136, 

 186, 187, 201, 202, 245, 246 ; trans- 

 lation of paper by, i. 245 ; on pro- 

 portion of sexes in Bombyx, ii. 70 



Quenstedt, work on the Lias by, i. 340 



Queries on expression, i. 287 



RABBITS, Angora, i. 181 ; skeletons of, 

 i. 181 ; ii. 210 ; Darwin's work on, 



ii-57 

 Race, nature's regard for, ii. 44 



