isplay of accessory 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 descent, 338
conditions which have determined 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 geographical proximity, 339

Dixon, Mr. C, changed habits of chaffinch in New Zealand, 76

Dogs, origin of, 88
varieties of, 89

Dolichonyx oryzivorus, diagram showing 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 insects, 106

Edwards, Mr. W.H., on dark forms of Papilio turnus, 248

Eggs protectively coloured, 214, 215
theory of varied colours of, 216

Elaps mimicked by harmless snakes, 261

Embryonic development of man and other mammalia, 448

Ennis, Mr. John, on willows driving out watercresses from
rivers of New Zealand, 24

Entomostraca, in bromelia leaves, 118

Environment never identical for two species, 149
direct action of, 418
direct influence of, 426
as initiator of variations, 436
action of, overpowered by natural selection, 437

Ethical aspect of the struggle for existence, 36

Euchelia jacobeae inedible, 235

Everett, Mr. A., on a caterpillar resembling moss, 205

Evidence of evolution that may be expected among fossil forms, 380

Evolutionists, American school of, 420

Exogens, possible cause of sudden late appearance of, 400

External differences of man and apes, 453

Extinct animals, number of species of, 376

Extinction of large animals, cause of, 394

Eye, origin of, 130

Eyes, explanation of loss of in cave animals, 416

=F=

Facts of natural selection, summary of, 122

Falcons illustrating divergence, 108
and butcher birds, hooked and toothed beaks of, 422

Fantails,