INDEX 



613 



Cytology, '184 

 Cytoplasm, 196 



Dakin, W. J., 373 



Danforth, 447 



Daphnia, 413 



Dafbishire, A. D., 245, 250 



Darwin, C, 4-6, S, ro-n, 17, 19, 23-31, 

 45, 89, 94, 9 6 -97. 124-25, 130, 160, 

 3° 8 , 3 74-77, 408, 438 



Darwin, E., 3, 16-17, 18, 21, 456-57 



Darwinism, 7, 8; critique of, 385-90; 

 defense of, general, 390-94; objec- 

 tions to, 385 



Dasypus novemcinctus, 54-55, 9S-99, 

 220-21 



Datura, 232, 327 



Davenport, C. B., 255, 25S, 319, 395, 



430-3 * 

 Davis, B. M., 327 

 De Candolle, A., 23, 98 

 Defectives, segregation of, 526-27 

 Democritus, 12 

 Dendy, A., 134, 136 

 Descartes, R., 15 



Determinants (Weismann's), 30-32, 310 

 Determination of sex, 219-27 

 Detlefson, J. A., 424-25 



Development: facts of, 105-6, outline 

 of animal development, 106-13 



De Vries, H., 7, 36-39, 43, 232, 245, 



269, 282, 313-31, 397-98 

 Differentiation, somatic, 195-96 



Difficulties and objections to natural 

 selection as seen by Darwin, 48-54 



Diganiety, female, 223-24 



Dinornis gravis, 65-66, 71, 116 



Diploid chromosome number, 205 



Diversity factors in evolution, 186-87 



Dividing factors in evolution, 188, 430- 



38 

 Dominance, Mendel's law of, 40-42, 



233-34, 238, 273 

 Dominant characters in man, 448-49 

 Domm, L. V., 229-30 

 Doncaster, L., 251 

 Downing, E. R., 463-69 

 Driesch, H., 34, 187 

 Drinkwater, H., 252, 450 



Drosophild melanogaster, chromosomes 

 of, 562; sex-linked heredity in, 277- 



81; mutations in, 209; linkage and 

 crossing-over in, 285 ff. 



Drummond, H., 378-79 



Duplicate factors, 276 



Durham, F. M., 269-71 



Ears of man and apes, 84-86 

 Earthworms and vegetable mold, 376- 



77 

 East, E. M., 43, 259, 339 

 Eaton, Rev. A. E., 72 

 Ectoblast, 107 



Edentates, distribution of, 161 

 Eimer, T., 34, 35 

 Elan vital. 428-29 

 Electric organ, of fishes, 355 

 Elephants, evolution of, 139-43 

 Elephas, 140-44; E. antiquus, 152; E. 



columbi, 158; E. leidyi, 158 



Embryology, evidences from, 105-16 



Emerson, R. A., 338 



Empedocles, 12-13 



Endoblast, 117 



Engrammes of Rignano, 413 



Enteleche, 34, 1S7 



Eoantkropus dawsoni, 156 



Epicurus, 14 



Epigenesis, 13 



Epilepsy, inheritance of, 450 



Equidae, 133-36 



Equus, 134-36, 148, 300-301 



Erigeron, 332 



Escherich, 379 



Eugenics: definitions of, 441; scope of, 

 442-44; methods of research in, 444- 

 45; aims and ideais of, 443-44; posi- 

 tive, 59S; restrictive, 523-28; and 

 unemployment, 536-37; and woman, 

 537 



Eupagurus, 385 



Euthenics, 508-20 



Evolution, organic: causal factors of, 

 186-89; definitions of, 3-5; evidences 

 of, 51-52; experimental, 52; mecha- 

 nism of, 185-86; nature of proof of, 

 51; progressive, 345-48; proof of, 49- 

 51 ; and religion, 8; what it is not, 8, 9 



Factor hypothesis, 253-72, 275-76 



Factorial analysis of color in mice, 269- 

 71; in swine, 271-72; in guinea pigs, 

 272 



