392 



INDEX 



Intermediaey 



evolutionary, 375 

 Introgression, 55, 109, 119 

 Isolation 



agents, 359 



mechanisms, 72, 167, 232 ft., 326, 

 330, 332 ft., 359, 377, 378, 385 



microgeographic, 235 



relation to behavior, 359 



reproductive, 15, 47, 374, 376, 

 377 



Jennings, H. S., 158, 159, 233, 241, 

 245, 248, 250, 253, 286, 319, 

 320 



Jordan, K., 5, 15, 17, 20 



Karyotype, 216 

 Kermack, K. A., 141, 148-152 

 Kimball, R. F., 252, 271 ft., 320 

 Kinne, O., 351, 366 

 Kiser, R. W., 84, 122 

 Koopman, K. F., 336, 337 

 Kosmoceras, 376 

 Kotaka, T., 135, 152 

 Kurten, B., 141, 152 



Lederberg, J., 285, 320 

 Leitch, D., 128, 152 

 Levine, M., 167, 320 

 Linnaean species, 42 

 Linnaeus, 2, 3, 15 

 Lorkovicz, Z., 20, 379 

 Lotsy, J. P., 42, 67, 79 



Margolin, P., 180,320 



Mason, H. L., 44, 60, 79 



Mating 



Paramecium aurelia, 164 

 reactions, intervarietal, 165 

 types, 158, 164 



Maupas, E., 157, 187,821 



Mavr, E., 10, 17, 21, 50, 08, 79, 80, 

 289, 821, 826, 337, 382, 387 



McKerrow, W. S., 138, 153 



Meadow lark, 860 



Meglitsch, P. A., 10, 14,21 



Melvin, [. B., 167,321 



Mendelian population, 26 

 Merging 



of species, 60 

 Metz, C. B., 242, 321 

 Micraster, 141, 147-151 

 Micronuclei, 178 

 Microspecies, 70, 382 

 Moore, J. A., 378 

 Morphological concept, 126 

 Morphological differences, 12, 376 

 Morphological types, 373 

 Munz, P. A., 53,' 77 

 Mustela 



comparison of osteological charac- 

 teristics, 133 

 Mytilus, 350, 352, 353 



Nannev, D. L., 186, 227, 229, 251, 



267, 321 

 Nereis, 350 

 Neurospora, 348 

 Newell, N. B., 125, 



153 

 Niggli,P., 11,21 



129, 143, 144, 



Objectivity, 2 

 Oeder, G.L., 7 

 Oenothera, 56 

 Oken, L., 9 

 Opuntia, 56, 70 

 Ornithella, 139 

 Outbreeders, 206 ft. 

 Outbreeding, 297 ft., 347 



indications of, 220 ft. 

 Overlaps, 48 



circular, of races, 50 

 Oxytrichia bijaria, 277 ft. 



breeding system, 278 

 Oysters (Crassest rca) , 354 



Paleontology, 127 



biological species in, 129 



typological, 127 

 Paramecium, 158 (1. 

 autogamy, 188 

 characters of species, 161 

 conjugation, 188 



