542 



INDEX 



Mandible, of insects, 33, 34, 35, 36, 40 



See also Jaw 

 Marble, 136 

 Marcus, E., 73, 78 



Marsupials, 137. 190, 191-192, 195, 201, 

 261-264, 26i, 266 

 interrelationships of, 121 

 Marsupium, 192 

 Martin, 292 

 Mascarene Islands, 291 

 Mastodons, 211, 213-214, 215, 216 

 Mate, choice of, see Sexual selection 

 Mating, homogamic, 475-476 



random, 427-429, 430, 435, 445, 490 

 See also Sexual selection 

 Matthew, W. D., 268, 269, 271, 278 

 Mauna Kea, 282 



Maxillae in insects, 33, 34, 35, 36, 40 

 Mayfly, 167 



Mayr, E., 142, 187, 235, 238, 244, 248, 

 249, 250, 256, 285, 305, 315, 317, 

 328, 363, 420, 425, 426, 447, 449, 

 471, 473, 475, 482, 483, 485, 488, 

 506, 507 

 Mazur, M., 90. 107 



Mechanical isolation, see Isolation, me- 

 chanical 

 Medawar, P. B., 423, 426 

 Mega-evolution. 502-506 

 Meganthropiis, 237 

 Meiosis, 380-385, 391,400 



in female, 383, 384, 385, 387, 398 

 in male, 380-383, 381, 386, 394, 395 

 suppression of, 399 

 Melanic, 366 



See also Melanism; Pigment 

 Melanin, 104, 276 



See also Pigment 

 Melanism, industrial, 366-370 

 natural, 375, 376 



See also Mendelian inheritance 

 Membrane, differentially permeable, 95- 

 98,96 

 embryonic, 191 

 nictitating, ^2-43 



See also Osmosis 

 Mendel, G., 124,380 

 Mendelian inheritance, 331-336, 332, 

 362, 376-402, 427-435, 437-444 

 in blood groups, 124, 334-335 

 of eye color: in Crustacea, 404-405; in 

 Drosophila, 403-404; in man, 332- 

 334, 348-349 

 of hair characteristics. 252, 334, 386- 



389, 388, 391, 392, 421-422 

 of melanism, 376-379, 377, 383, 384- 



385, 427-429, 432-435, 438-441 

 of plant height, 391-i9i 



Mendel's law of independent assortment, 



see Assortment, independent 

 Mendel's law of segregation, 376, 385 

 Merrell, D. L, 476, 482 

 Merychippus, 11, 204, 409-410, 409, 412, 

 '413 



brain of, 205 



limbs of, 202, 205. 206 



skull of, 799, 205 



teeth of, see Teeth 

 Mesoderm. 49, 53, 55, 72 

 Mesoglea, 72 

 Mesohippus, 204, 409, 412, 485 



brain of, 202 



limbs of, 203 



skull of, 799, 203 



teeth of, 203 

 Mesonephros, 68-69 



See also Kidney 

 Mesozoic era, 13, 137, 138, 173-192, 



290 

 Metabolism, 401 



defined, 84 



genes controlling, see Genes 

 Metamere. 39 



Metamorphosis, biochemical, 105-106 

 Metanephros, 68-69 



See also Kidney 

 Metazoa, origin of, 69-73, 71 

 Microevolution, 361, 502 

 Microgeographic races, see Subspecies 

 Migration, 265, 446, 469-470, 473, 474 



See also Bridge, land 

 Miller, M. M., Jr., 121 

 Miller, R. R., 447, 449 

 Millipede, 137, 154 

 Millot, J., 159, 172 

 Mimicry, aggressive, 373 



protective, 370-373, 372; Batesian, 370, 

 371, 373, 493; Mullerian, 370, 371, 

 493 

 Mind, human, 219 



See also Brain 

 Miocene period, 137, 194. 205, 213, 224- 



225,226-228,266.291 

 Miohippus, 201, 203, 204, 205, 485 

 "Missing links," 188,233 

 Mississippian period, 137, 163-164 

 Mite, 155 

 Mitosis, 83, 381, 383, 384, 385 



See also Cell division 

 Moa, 44 



Mockingbird, 292, 293 

 Moeritheriiim, 210-212, 277, 272, 216 

 Moffatt, 511 

 Molars, see Teeth 

 Mold, bread, see Neiirospora 



fossil, 129 



