INDEX 
Darwinism, 7, 8; background of, 188— 
216; critique of, 245-62; defense of, 
general, 252-56; objections to, 247- 
52 
Dasypus novemcinctus, 366, 375-78 
Datura, 395 
Davenport, C. B., 257, 333, 372, 393 
396, 474, 475 
Davenport, G. C., 400 
Davis, B. M., 360 
De Candolle, A., 23, 122 
Defectives, segregation of, 479-80 
Democritus, 12 
Dendy, A., 71, 73 
Descartes, R., 15 
Determinants (Weismann’s), 30, 31, 32, 
265 
Determination of sex, 449-56 
Development: facts of, 164, 165; out- 
line of animal development, 165-72 
De Vries, H., 7, 36, 37, 38, 39, 43, 258, 
260, 261, 273, 335, 346-60, 380, 393, 
429 
Difficulties and objections to Natural 
Selection as seen by Darwin, 236-42. 
Difflugia, 378 
Digby, L., 363, 364 
Dihybrid ratio, 391 
Dinornis gravis, 136, 137, 142 
Dominance, Mendel’s Law of, 40-42, 
381, 382, 386 
Doncaster, L., 399 
Downing, E. R., 459-72 
Driesch, H., 34 
Drinkwater, H., 400, 460 
Drosophila ampelophila, 318, 321, 380, 
444; chromosomes of, 401, 402, 403; 
sex-linked heredity in, 433-38 
Drummond, H., 214, 215 
Durham, F. M., 429, 430 
Ears of man and apes, 155, 156, 157 
Earthworms and vegetable mold, 214 
East, E. M., 43, 419 
Eaton, Rev. A. E., 143 
Ectoblast, 166 
Edentates, distribution of, 98 
Edwards, J., 483 
Eimer, T., 34, 35, 264 
Elderton, E. M., 493 
Electric organ, of fishes, 196 
517 
Elephants, evolution of, 76-80 
Elephas, 76, 77, 78, 79, 80; E. antiquus, 
89; E. columbi, 85; E. leidyi, 85 
Embryology, evidences from, 60, 164-72 
Empedocles, 12, 13 
Endoblast, 166 
Engrammes of Rignano, 335 
Enteleche, 34 
Environment: effects of, on develop- 
ment, 317, 318; effects of, on heredity, 
312-16, 318-20; and heredity, 312, 
313 
Eoanthropus dawsoni, 93 
Epicurus, 14 
Epigenesis, 13 
Epilepsy, inheritance of, 465 
Equidae, 70, 71, 72, 73 
Equus, 71, 72, 73; E. leidyi, 85 
Escherich, 215 
Eugenics: Carnegie Laboratory of, 459; 
and cruelty to children, 502, 503; 
defined, 473; Education Society, 505; 
and Euthenics, 484-96; Galton 
Laboratory of, 459; positive, 480-83; 
and religion, 508, 509; _ restrictive, 
475-480; and unemployment, 501, 
502; and woman, 502 
Eupagurus, 246 
Euthenics, 473, 484-96 
Evolution, organic: causal factors of, 
185; definitions of, 3, 4, 55 evidences 
of, 59, 60; experimental, 60; nature 
of. proof of, 59; proof of, 57, 58, 59; 
what it is not, 8, 9 
Fabre, M., 231 
Factor hypothesis, 417-28 
Factorial analysis of color in mice, 429- 
30 
Factors, in Neo-Mendelian heredity: 
complementary, 417-20; cumulative, 
424; inhibitory, 421-23; lethal, 432; 
in quantitative inheritance, 424-28 
Farmer, J. B., 363, 364 
Farrabee, W. C., 400 
F aca inheritance of, 463, 
404 
Fertilization, 301, 302 
Fierasfer acus, 198, 199 
Filaria sanguinis hominis, 212 
Filial Regression, Galton’s Law of, 
372-74 
Flower, Professor, 162 
