496 



INDEX 



Racehorse, selection by man, i. 380 ; 

 Wallace on fleetness of, i. 283 ; 

 equality of sexes in, ii. 42 



Races of man, i. 168 ; causes of differ- 

 ence in, ii. 33 ; Wallace on, ii. 34-6 



Rafflesia, parasites allied to, i. 262 



Rain, effect on leaves, ii. 370, 409 ; 

 movements of leaves as means of 

 shooting off, ii. 368 



Ramsay, Sir A. C., on origin of lakes, 

 i. 252; ii. 170, 211; Geological 

 Society hesitates to publish his paper 

 on Lakes, ii. 155 ; on ice-action, 

 ii. 153-5, 170 ; on insects in tropics, 

 ii. 122 ; memoir by Geikie of, ii. 

 170; on denudation and earth- 

 movements, ii. 1 20-22 ; overestimates 

 subaerial denudation, ii. 156 ; on 

 Parallel Roads of Glen Roy, ii. 191 ; 

 on Permian glaciers, ii. 154 ; pro- 

 posal that he should investigate glacial 

 deposits in S. America, ii. 161 ; 

 mentioned, i. 65, 137, 151, 231 ; 

 ii. 15 



Range, De Candolle on large families 

 and their, i. 444 ; coleoptera and 

 restricted, i. 200, 201 ; of genera, 

 i. 402, 403 ; of shells, i. 96 ; size of 

 genera in relation to species and their, 

 i. 435 ; of species, i. 46, 117 



Ranunculacese, evidence of highness in, 



i- 413 



Ranunculus auriconnis, i. 36 



Ranyard, A. C., letter to Nature on 



pangenesis, i. 302 

 Raoul Island, Hooker on, i. 436 

 Raphael's Madonna, referred to by 



Darwin, i. 330 

 Raspberry, germination of seeds from 



a barrow, ii. 243, 246 ; waxy secre- 

 tion of, ii. 409 

 Rattlesnake, Wright on uses of rattle 



of, i. 356 



Raven, said to pair for whole life, ii. 65 

 Ray Society, work of, i. 94 

 Raymond, Du Bois, work on plants, 



ii. 396 

 Reade, T. M., letters to, ii. 146, 147, 



211, 212 ; on age of the world, ii. 211 

 Reader, sold to the Anthropological 



Society, i. 263 

 Reading, Darwin complains of lack of 



time for, i. 304 ; little time given by 



scientific workers to, i. 475 

 Reciprocal crosses, half-sterility of, i. 



295 

 Rede Lecture, by Phillips (1860), ii. 31 



Reduction, cessation of selection as 

 cause of, i. 352 ; organs of flight and, 

 i. 171 ; wings of ostrich and, i. 162 



References, Darwin on importance of 



giving, ii. 17 ; Wallace on, ii. 19 

 Regeneration, i. 235 ; power of, i. 251 ; 

 ii. 427 ; reference in Variation of 

 Animals and Plants to, i. 363 

 Reign of Law, The Duke of Argyll's, 

 i. 277, 281, 283; reviewed by 

 Wallace, i. 182 

 Reindeer, of Spitzbergen, i. 144 ; horns 



of, ii. 78 



Religion and science, i. 308, 309 

 Representative species, i. 177; ii. 27, 

 28 ; in floras of Japan and N. 

 America, i. 459, 460 ; in Galapagos 

 Islands, i. 402 



Reproduction, difference in amount of 

 energy expended by male and female 

 in, ii. 93 



Reproductive organs, St.-Hilaire's view 

 of affaiblissement and development 

 of i. 413 ; in relation to theoretical 

 questions, i. 218 



Research, Huxley and, i. 158 ; justifi- 

 cation of, i. 6 1 



Reseda lutea, sterile with own pollen, 

 ii. 300 ; R. odorata, experiment on 

 cross- and self-fertilisation, ii. 300, 356 

 Resemblance, mimetic, i. 196, 197 

 Resignation, expression in, ii. 103 

 Restiacese, former extension of, i. 380 

 Restricted distribution, i. 446 

 Retardation, Cope on, i. 341 

 Retrogression, i. 142, 165 

 Reversion, i. 103, 120, 199 ; in am- 

 monites, i. 341 ; Darwin on, i. 473 ; 

 and degeneration of characters, i. 

 344 ; factors causing, i. 357 ; hybrid- 

 ism and, i. 397 ; ii. 340 ; Lord 

 Morton's mare and, i. 364 ; stripes 

 of mules due to, i. 320 ; struggle 

 between Natural Selection and, i. 

 353 ; and crossing, ii. 75 ; peloria 

 and, ii. 335 

 Review of the Descent of Man, by J . 



Morley, i. 324-9. 



Reviews, Darwin on an author writing 

 his own, i. 158; on the Origin of 

 Species, by Asa Gray, i. 140, 166, 

 170; Haughton, i. 153 ; Hopkins, i. 

 153 ; Hutton, i. 183 ; Huxley, i. 140, 

 280 ; F. Jenkin, i. 282 ; Owen, i. 

 145-7, 149; Wilberforce, i. 156 

 Rhamnus, ii. 416 



Rhexia, flowers of, ii. 295-7 ; R. vir- 

 ginica, W. H. Leggett on anthers, 

 ii. 292 



Rhinoceros, i. 129 

 RhinochetiiS) ii. 17 



Rhizocephala, retrograde development 

 in, i. 212 



