Cuckoo, 220, 233, 235, 236, 243, 244, 247, 248, 289 —— shrike, 248 _Cuculus canorus_, 289 Cuénot, 149 Cunningham, Col., 225, 226, 358 —— J. T., 15, 19, 20, 324, 325, 329, 331, 332, 333, 336 Cupples, Mr, 308 Curassow, 104, 304 Currant, 119 Cut-throat finch, 122 _Cypselus affinis_, 243 _Cytisus adami_, 119 D Dafila acuta, 122 Dahlia, 86 Daisy, 266, 274 Daltonism, 340 _Damaliscus lunatus_, 363 Damp as a check to multiplication of species, 350, 351 _Danaidæ_, 175, 179, 215, 216, 226, 228 _Danais chrysippus_, 179, 250 Danger signal, 183, 214, 253, 254 Darter, 277 Darwin, 1-12, 14, 25-27, 31, 35, 42, 52, 54-7, 59, 60-3, 68, 83, 96, 112, 114-7, 119, 123, 127, 130, 151, 171, 175, 182, 184, 233, 259, 299, 301-8, 316, 319-21, 325, 326, 347 “Darwin and after Darwin,” 370-5, 377, 381 Darwinian theory, 3, 5-8, 11, 13, 27, 28, 35, 42, 45, 52, 75, 111, 171 Darwinism, 1, 7, 8, 11, 14, 26 “Darwinism,” 40, 53, 112, 117, 178, 207, 213, 228, 322, 323 “Darwinism To-day,” 16, 45, 67 _Dasyurus_, 283 De Candolle, 86 Decorative plumage, 40 Deer, 101, 120, 180, 298 Deerhound, 304, 308 Deer-ponies, 125 Degeneration, 168 Dejerine, 340 Delage, 33, 147 Delbœuf, Law of, 373 _Delias eucharis_, 216, 220, 221 _Demiegretta_, 100 Demoiselle crane, 277 “Descent of Man,” 234, 299, 301, 302, 304, 305, 319, 320, 326 Determination of sex, 165 “Development and Heredity,” 17 De Vries, 26, 66, 69-72, 75-8, 82-9, 95, 105, 118, 151 Dewar, D., 43, 44, 47, 48, 195, 204, 206, 208, 210, 225, 233, 236, 303, 308, 309, 354, 360, 378 Dewar, G. A. B., 196, 197 _Dicrurus ater_, 179, 233 _Didelphys nurina_, 243 Dimorphism, sexual, 51, 200, 201 _Dipsacus_, 58 Disease as a check to multiplication of species, 351 _Dissemurus paradiseus_, 179, 220 Divergence of character, 367 Dog, 59, 68, 99, 100, 125, 225, 226, 282, 283, 304, 308, 352, 357, 364, 365 Dog-rose, 261 Dolphin, 99 Dominant characters, 142 Donald, Mr D., 256 Dragon-fly, 216, 264 Driesh, 136 Drongo cuckoo, 233 Drongo-shrikes, 179, 220 Drummond, 382 Duck, 51, 60, 68, 97, 99, 100, 122, 126-8, 190, 247, 249, 282, 292, 314, 315, 334, 337, 338, 365 Duiker-buck, 243 Dyer, Sir William Thistleton, 26