520 READINGS IN EVOLUTION, GENETICS, AND EUGENICS 
McFarland, J., 28 
McGregor, J. H., 90 
Madagascar, fauna of, 110, 111 
Maeterlinck, 200 
Mallophaga, 271, 272 
Malthus, 17, 23, 24, 26, 223 
Mammalian dispersal, 114-15 
Mammary glands, as adaptations, 196 
Man: of Chappelle-aux-Saints, 91; 
Cré-Magnon Man, 93, 94; chrono- 
logical table of fossil man, 87; descent 
from trees, significance of, 84; evolu- 
tion of, 81-96; evolutionary changes 
of, 84; fossil man, 84-94; Heidel- 
berg Man, 88, 89, 91; impelling 
cause of origin, 83; Neanderthal 
Man, 89-92; origin of, 82-84; Pilt- 
down Man, 92, 93; place of origin, 
82, 83; of Spy, 91; stock of, 82; 
time of origin, 83, 84 
Mantis religiosa, 257 
Marriage laws and eugenics, 477 
Marsh, O. C., 72 
Marshall, A. M., 214 
Marsupial pouch, as adaptation, 196, 
197 
Mastodon, 76, 77, 78, 79, 85 
Materialism, the relation of evolution 
to, 46-53 
Matthew, W. T., 81 
Matthiola, 394 
Maturation: of egg-cell, 299, 300, 301; 
of sperm-cell, 298, 300 
Maupertius, 15 
Median, in variation, 367 
Meek, 364 
Megalonyx jeffersoni, 85 
Mendel, G., 40, 260, 346; his concep- 
tion of purity of gametes, 386, 387; 
his conception of unit characters, 386; 
his experiments, 381; his explana- 
tions, 386-92; his Law of Domi- 
nance, 40-42, 381, 382, 386; his Law 
of Segregation, 40-42, 382-385; 
his life and character, 380; his results, 
381, 382 
Mendelian heredity: in cats, 399; 
crossing-over in, 441-48; in guinea- 
pigs, 309, 432, 433; in Helix, 396; 
in Lina lapponica, 396; linkage in, 
441-48; in maize, 394, 394; in man, 
399, 400; in mice, 384, 385, 398; 
in nettles, 3953 in numerous species, 
393, 394; in peas, 384; in pigeons, 
397,398; in poultry, 396, 397; in 
rabbits, 399; in silkworms, 395, 396 
Mendelism: physical basis of, 401-12 
Mesohippus, 72 
Metcalf, M. M., 6, 32, 200-204 
Metz, C. E. V., 297, 363, 436 
Meyer, L., 155 
Miastor americana, 294, 295 
Millson, A., 214 
Milton, J., 14 
Mimicry, 203 
Miohippus, 72 
Mirabilis jalapa, 
M. rosea, 394 
Mivart, 135, 136 
Mneme theory of Semon, 335 
Mode, in variation, 367 
Modifications, 308, 309 
Moeritherium, -76, 77, 78 
Monohybrid ratio, 389 
Moore, C. R., 454 
Morgan, L., 264 
Morgan, T. H., 42, 43, 44, 260, 261, 267, 
318, 321, 355-60, 379, 433-38, 442, 
443 
Morphology, evidences from, 129-63 
Moulton, F. R., 57 
Miller, F., 170, 172, 239 
Miiller, H. J., 408, 437 
Multiple factor hypothesis, 424-28 
Mutation theory, 346-64; advantages 
over Natural Selection, 359; alterna- 
tive to Natural Selection, 272; criti- 
cism of, 359-60; De Vries’ own 
account of, 348-55; _ historical 
account of, 36-38; Morgan’s sum- 
mary of, 355-59 
Mysis larva of Peneus, 170 
394, 415, 416, 424; 
Nabours, R. K., 448 
Nageli, C. von, 34, 35, 333» 380 
Natural Selection, 4, 12, 24, 25, 26, 35, 
37, 38, 223-43; experimental sup- 
port of, 256-58; present status of, 
258; relation of Mendelism and 
mutation to, 258-62 
Naudin, C., 41 
Nauplius larva of Peneus, 170 
Neanderthal Man, 88-92 
Nebular hypothesis, 57 
Neo-Lamarckism, 29, 335, 330 
