INDEX 
Homologies, evidences from, 60 
Homozygote, 390 
Hooker, Sir J., 109, 223, 247, 330° 
Hormone theory of sex differentiation, 
454-56 
Hormones, 454 
Horse: ancestry of, 8; feet and teeth in 
fossil pedigree of, 72; fossil pedigree 
of, 70, 71, 72, 73 
Horseshoe-crab, 127 
Hrdlicka, A., 86 
Hudson, W. H., 206 
Human antiquity, evidences of, 93, 94 
Human conservation, 473-83 
Humanity, future of, 95, 96 
Humerus, perforations of, in Quadru- 
mana, 162 
Hurst, C. C., 43, 393, 396, 399, 400 
Hutton, J., 22, 57 
Huxley, T. H., 28, 29, 62, 63, 91, 208 
Hyatt, A., 35 
Hybridization and the origin of species, 
43 
Hyracotherium, 71 
Immigration and eugenics, 475-76 
Immunity coloration, 203 
Induction, a temporary change in 
germ-cells, 335, 336 
Infant mortality movement, 494 
Inheritance: of acquired characters 
(see Acquired characters); of brachy- 
dactylism, 460; of cataract, 461; 
of feeble-mindedness, 459, 462-64; 
of human characters, 459-72; of 
insanity, epilepsy, etc., 459, 465, 466; 
in royalty, 466-72; sex-linked, 433-40 
_Insanity, inheritance of, 465 
Intraselection, 268 
Isolation: biologic, 272; geographic, 
269-72; theories of, 20, 32, 33, 269- 
73; reproductive, 272, 273 
Jennings, H. S., 261, 377, 378 
Johannsen, W., 369, 376, 377 
Johnson, R. H., 484-96 
Jones, D. F., 448 
Jordan, D.S., 4, 32, 33, 34, 63, 64, 65, 66, 
121, 165-74, 188, 195, 202, 270, 271, 
273, 478, 479, 482 
Joule, J. P., 277 
Judd, J. W., 10, 23, 24 
519 
Kallima, 201, 204, 250 
Kammerer, P., 336 
Kant, E., 15, 16 
Kellogg, V. S., 4, 32, 33, 34, 63, 64, 65, 
66, 121, 165-74, 188, 195, 202, 245- 
47, 253, 266, 273 
Kelvin, Lord, 67, 68, 277 
Kinetogenesis, 35 
King, C., 67 
Klebs, E., 312, 313 
Knight, T., 40 
Kohlreuter, J. G., 40, 41 
Korchinsky, H., 36 
Lamarck, J. P., 7, 10, 11, 18, 19, 20, 21, 
118, 247, 307, 330, 345 
Lamarckism, 7, 21, 247 
Lang, A., 395 
Laplace, P. S., 57 
Laplacian hypothesis, 67 
Laughlin, H. Hy, 474 
Le Conte, J., 3, 46-53 
Leibnitz, 15 
Leighty, C. E., 370 
Lemuroidea, 126 
Lepas, metamorphosis of, 171 
Lepidosiren, 236 
Leptinotarsa decemliniata, 321, 361, 377 
Lillie, F. R., 455, 456 
Lina lapponica, 396 
Lincoln, A., 24 
Linkage, in Mendelian heredity, 441- 
48; chromosome theory of, 442; 
measurements of, 444, 445 
Linnaeus, 16, 43, 117 
Locy, W. A., 41, 42, 43 
Loeb, C., 461 
Loess Man, 85 
Lotsy, J. P., 43 
Love, H. H., 370 
Lowell, J. R., 330 
Lucas, A. H. S., 218 
Lucretius, 14 
Lull, R.S., 3, 5, 24, 25, 73, 76, 79, 81-96 
Lychnis, 393, 436 
Lydekker, R., 178 
Lyell, Sir C., 3, 8, 23, 26, 57, 58, 67 
Maas, O., 180 
Macdougal, D. T., 319, 320, 361, 362 
McCracken, I., 396 
