INDEX 



483 



Darwiu, on correlation of sterility and 

 colour, 169 

 on selective association, 172 

 on infertilitj' and natural selec- 

 tion, 174 

 on cause of infertility of hybrids, 



185 

 on white tail of rabbit, 218 

 on conspicuous cateri>illars, 236 

 on sexual selection in insects, 



274 

 on decorative plumage of male 



birds, 285 

 on development of ocelli, 290 

 on value of cross-fertilisation, 309 

 on limits to utility of inter- 

 crossing, 326 

 on flowers due to insects, 332 

 on oceanic islands, 342 

 on effects of disuse in domestic 



animals, 415, 435 

 on direct action of environment, 



419 

 on unintelligibility of theory of 

 retardation and acceleration, 

 421 (note) 

 on origin of man's moral nature, 



4ei 



Mr. George, on intermarriages 

 of British aristocracy, 326 

 Darwinian theory, statement of, 10 

 not opposedip spiritual nature 

 of man, 4^ 

 Dawkins, Professor Boyd, on develop- 

 ment of deer's horns, 389 

 on recent origin of man, 456 

 Dawson, Sir W., on determination of 

 fossil plants by leaves, 398 

 (note) 

 Death of wild animals usually pain- 

 less, 38 

 De Candolle, definition of species, 1 

 on difficulty of naturalising 



plants, 15 

 on war between plants, 16 

 on origin of useful cultivated 

 plants, 97 

 Deer's horns, development of, 389 

 Degeneration, 121 

 Delbocuf's law of variation, 141 

 Dendraeca coronata, variation of wing- 

 feathers of, 51 

 Denmark, struggle between trees in, 20 



Denudation, evidences of, 379 



Desert animals, colour of, 192 



Deserts, eflect of goats and camels in 

 destroying vegetation in, 17 



Development and display of acces- 

 sory plumes, 293 



Diadema anomala, 271 



niisipjius, great diversity of sexes 

 in, 271 



Diap)hora mendica mimics Spilosoma 

 menthrasti, 249 



Difficulties in the facts of fertilisation 

 of flowers, 325 



Dimorphism and trimorphism, 156 



Dippers, probable origin of, 116 



Disease and markings, 290 



Diseases common to man and animals, 

 449 



Display of decorative f)lumage, 287 



Distribution of organisms should be 

 explained by theory of de- 

 scent, 338 

 conditions which have deter- 

 mined the, 341 

 of marsupials, 350 

 of tapirs, 352 



Disuse, effects of, among wild animals, 

 415 

 no proof that the effects of, are 

 inherited, 417 



Divergence of character, 105-109 



leads to maximum of forms of 

 life in each area, 109 



Diversity of fauna and flora with geo- 

 graphical proximity, 339 



Dixon, Mr. C, changed habits of 

 chaffinch in New Zealand, 76 



Dogs, origin of, 88 

 varieties of, 89 



Dolichonyx oryzivorus, diagram show- 

 ing variations of, 55 



Domestic animals, varieties of, 88 



Draba verna, varieties of, 77 



Dress of men not determined by 

 female choice, 286 



Dust from Krakatoa, size of particles 

 of, 363 



E 



Eastern butterflies, variation of, 45 

 Eaton, Rev. A. E., on Kerguelen in- 

 sects, 106 



