INDEX 



615 



Hegner* R. YY\, 204 



Helix hortensis, 248; II. nemoralis, 248 



Henderson, L. J., 350 



Heraclitus, 12, 219 



Herbert, S., 364 



Heredity: environment and training, 

 4S5-90; Gideon's laws of, 471-75; in 

 man, 446-90; in pure lines, 212-16; 

 statistical study of, 470-75 



Hermaphrodites, 200; sex-chromosomes 

 in, 225-26 



Hermit crabs, 67-69 

 Heron, David, 461 

 Herschel, Sir J., 3 

 Heterogenesis theory, 36 

 Heterosis, 302-5 

 Heterozygote, 242 

 Hieracium, 332 

 Hippocrates, 219 



Homo: //. heidelbergensis, 151; H. sa- 

 piens, 151, 153, 155-56; H. ncandcr- 

 thalensis, 152-56; H. primagenius, 

 152 



Homologies: evidences from, 52; valid- 

 ity of the principle of , 55-56; versus 

 analogy, 56-57 



Homozygote, 242 



Hooker, Sir J., 385, 408 



Hormone theory of sex differentiation, 

 228-31 



Hormones, 228-31 



Horse: ancestry of, 8; feet and teeth in 

 fossil pedigree of, 135; fossil pedigree 

 o f , 133-35, 157; hybrids of, 300-301 



Horseshoe-crab, 1 13 



Hrdlicka, A., 149 



Human antiquity, evidences of, 156-57 



Human conservation, 570-80 



Humanity, future of, 158-59 



Humerus, perforations of, in Quadru- 

 mana, 91 



Hurst, C. C, 43, 245, 248, 251-52 



Hutton, J., 22, 57 



Huxley, T. II., 28-29, 125-26, 154, 371 



Hyatt, A., 35 



Hybrid vigor, 302-3 



Hybridization : and the origin of species, 

 43; role of, in evolution, 299 ff. 



Hymenoptera, parthenogenesis in, 225 

 Hyracotherium, 134 



Identical twins, origin of, 478-79; 



reared apart, 487-90 

 Immigration and eugenics, 523-24 

 Inbreeding, 304-7 



Induction: a temporary change in germ- 

 cells, 413-14; of hereditary varia- 

 tions, 45 



Infant mortality movement, 586 ff. 



Inheritance: of acquired characters {see 

 Acquired characters); of brachydac- 

 tylism, 450-52; of cataract, 452-53; 

 of feeble-mindedness, 458-61; of hu- 

 man characters, 448-50; of insanity, 

 461-62; in royalty, 462-69; sex- 

 linked, 277-84 



Insanity, inheritance of, 461-62 

 Interference, in crossing-over, 293 

 Intersexes: in birds, 229-31; in cattle, 



2 3 I_ 32; in Drosophila, 226-27; in 



gypsy moth, 227 



Isolation: 430-38; and selection, 431- 

 32; geographic, 432-35; through sheer 

 distance apart, 435-36; theories of, 

 20, 32-33, 430-38; biotic, 437, 438; 

 reproductive, 436-37; psychic, 438; 

 types of, 188 



Jeffries, E. C, 327 



Jennings, H. S., 217, 399, 441, 506-7 



Johannsen, \Y., 212-15 



Johnson, R. H., 508-20 



Jones, D. F., 126, 129, 284, 303, 304, 

 306 



Jordan, D. S., 4, 32-34, 97, 106-13, 186, 



349, 432-34 

 Judd, J. W., 10, 23-24 



Kallima, 363-65 



Kammerer, P., 414 



Kant, E., 15-16 



Kellogg, V. S., 4, 32-34, 97, 106-13, 

 126-30, 349, 354, 383-85, 391 



Kelvin, Lord, 130-31 



Kinetogenesis, 35 



King, C, 130 



King, Helen D., 305-6 



Knight, T., 40 



Kohlreuter, J. G., 40-41 



Korchinsky, H., 36 



Lamarck, J. P., 7, 10-n, 18-21, 94, 



308, 385 

 Lamarckism, 7, 21, 308 



