530 



INDEX 



DOMINAKCE, MODIFICATIOKS OF, 

 265 



Blue Andalusian, 266 

 echinoderm hybrids, 268 

 extra toe in fowls, 267 

 in red x white Mirabilis, 



265 

 nature of, 278 

 not fundamental, 279 

 plain X banded snails, 266 

 red X white cattle, 266 

 sex-limited characters, 270 

 sex-linked characters, 270- 



278 

 white X black leghorns, 267 



Dominant characters, 227 

 "extracted," 230 

 ratio to recessive, 233 



DosrcASTEK, 494 



Double monsters, SIB, S16, 322, 

 3SS 



JDriesch, 333, 494 



DaosopHiLA, rapid breeding of, 

 290 

 sex-linked characters, 166, 

 S71, S7B, 273, 275 



Dkyden, 206 



Duplex Characters, 249 



Duty, 443, 459 

 of science, 480 



Dwarfs, true, 293, S94 

 caused by alcohol, 312 



Dynamic equilibrium, 10 



Ear, development, 28 



East, heterozygosis, 384, 385, 

 386, 497 



Echinoderm type of egg, 178 



Ectoderm, 25, 27, 28 



Education, and heredity, 438 

 definition, 354 

 good and bad, 354, 356, 357 

 habit formation, 457 

 limiting activities, 356, 357 

 more potent in man, 354 

 needs of 475 

 possible improvements, 489 



Egg and sperm, hereditary in- 

 equality of, 176 



Egg nucleus, 16, 24 



Egg organization, types of, 

 178 



Ellis, 494 



Elsberg, plastidules, 100 



Emboltment, 81 



Embryogeny, 36 



Embryology, experimental, 307 



Embryonic differentiation, pro- 

 cesses in, 179 



Embryos, double, 315, 316, 322, 

 323 

 dwarf, 315 



half and three quarter, 317, 

 319 ■ 



Endoderm, 25, 27, 28 



"Energies of Men," 472 



Engelmajstit, 49 



English sparrow in U. S. 432 



Engrammes, 348 



Environment, acting at sensi- 

 tive period, 375 

 definition, 307 

 direct action on germ cells, 



351, 348 

 and education, 360 

 good and bad, 355, 356, 357, 



475, 476 

 influence in producing new 



races, 375, 376 

 influence on ontogeny, 303, 



305 

 influence on phylogeny, 303, 



305 

 possible improvements, 489 

 social institutions and, 304 



Epidermolysis, 393 



Epigenesis, 81, 83, 161, 180, 452 



Epilepsy, 205, 206, 395 



Equality of Man, 303, 448 



Ethical Obligation, 484 



Ethics, 491 



Eugenicist, methods of, 416 



Eugenical rules as to defects, 

 recessive, 431, 432 



