INDEX 
483 
Darwin, on correlation of sterility and 
colour, 169 
on selective association, 172 
on infertility and natural selec¬ 
tion, 174 
on cause of infertility of hybrids, 
185 
on white tail of rabbit, 218 
on conspicuous caterpillars, 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, 
461 
Mr. George, on intermarriages 
of British aristocracy, 326 
Darwinian theory, statement of, 10 
not opposed to spiritual nature 
of man, 478 
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 
Delbceuf’s law of variation, 141 
Dendrseca eoronata, variation of wing- 
feathers of, 51 
Denmark, struggle between trees in, 20 
Denudation, evidences of, 379 
Desert animals, colour of, 192 
Deserts, effect of goats and camels in 
destroying vegetation in, 17 
Development and display of acces¬ 
sory plumes, 293 
Diadema anomala, 271 
misippus, great diversity of sexes 
in, 271 
Diaphora 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 plumage, 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 
