542 



INDEX 



Lamarckian Hypothesis, 356 

 Lamarckism, 41 



Lang, snail hybrids, 273, 294 

 Laws on Eugenics, 436, 437 

 Learning by experience, 70, 



481 

 Left-handedness, inheritance of, 



210 

 Lens, cataract, 205, 304 

 development of, 340 

 displaced, 304 

 weight of, 205 

 Leptinotarsa, selection in 387 

 Life, artificial production of, 

 310, 312 

 conditions limited, 469 

 definition of, 9 

 maze of, 479 

 Lillie, fertilization 16 

 on fertilizin, 160 

 sex determination, 157 

 Limbs, transplanted, 341 

 Lincoln, 440 

 Localization Pattern, 181 



in eggs of ctenophore, flat- 

 worm, echinoderm, anne- 

 lid-mollusk, chordate, 181, 

 182 

 Localization of substances in 



cells, 191 

 Lock, 510 



I.oeb, J. Artificial partheno- 

 genesis, 114, 159, 511 

 reflexes, 60 

 tropisms, 60 

 Logic, as test of truth, 467 

 Loligo, symmetry of egg, 175 

 Longevity inherited, 208, 209 

 Lotsy, source of variations, 393 

 Loavell, Biglow Papers, 343 

 Lnxurv, cause of infertility. 

 452, 453 

 in education, 491, 492 



Macfarlane, on Dionaea, 61 



McClendon, production of one- 

 eyed monsters, 159 



McClung, on sex determina- 

 tion, 147, 171 



MacDougal, influence of chem- 

 icals on ovules, 319 



MacDowell, size in rabbits, 

 292 

 Selection in Drosophila, 389 



McGregor, Restoration of 

 Pithecanthropus skull, 409 



Male babies, greater mortality, 

 156 



Malthus, theory of, 436 



Man, controls destiny, 410 

 dominant races of, 412 

 evolution of, 407-415 

 extermination of, 413, 414 

 extinct types of, 408, 409 

 freer than animals, 481 

 mongrel race, 441 

 place in nature, 3 

 prehistoric, 410 

 races of, 4l2 

 species of, 408, 409 

 value of races of, 412 



Maoris of New Zealand, 413, 



Marriage, age of, 435, 446 

 selection, 442-444 



Marsupials, 35 



Massart, reactions of Spirilla, 

 55 



Materialism, 47 



"Maternal impressions," 35 



Matter and mind, 48 



Maturation period, 141 

 divisions, 141-144 



Maze, of heredity, 220, 306 

 life, 479 



Mechanism of Development 

 86 



Mechanism of Heredity, 157 



Mechanistic hypothesis, 495 



Mediocrity, tendency to, 224 



Meischer, On stereoisomeres of 

 albumin, 161 



