INDEX 



547 



Prognathism, 231, 234, 239 



Progress of organisms, 499-500, 519-520 



Pronephros, 68 



See also Kidney 

 Propliopitheciis, 224 

 Prosimii, 221, 223 



Prospective adaptation, see Preadapta- 

 tion 

 Prosser, C. L., 102. 107 

 Protective coloration, 322, 364-373 

 Protein, 80 



digestion and absorption of, 86-87 



first, 91,498 



formation of, 5/, 87.498 



manufacture of, 84-86 



serum, see Serum proteins 

 Proterozoic era, 137, 143. 145-146 



See also Pre-Cambrian era 

 Protista, 70 

 Protoceratops. 1 84 

 Protochordates, 707-102 



See also Amphioxus; Balanoglos- 

 siis; Molgiila 

 Protohippus, see Merychippus 

 Protoplasm, 80, 57. 82, 95, 97 

 Protozoa. 70. 71, 73, 94, 134, 145, 146, 

 311,315 



colonial, 70, 77, 72 

 Protylopits, 272 

 Psittirostra kona, 303 

 Pseudonestor, 302-iOJ 

 Psychological isolation, see Isolation, re- 

 productive 

 PTC, see Phenylthiocarbamide 

 Pteranoilon. 186 

 Pterodactyl, see Pterosaur 

 Pterosaur, 777, 7S6-187. 505 



brain of, 186 



limbs of, see Limbs 

 Pure lines, 354, 467, 476 

 Pygmies, 251, 252 

 Python, vestiges in, 43 



Quantum evolution, 505 

 Quaternary, 137, 194 

 Quills, 120 



Rabbit, 117-119,266,370 

 caecum and appendix in, 41 

 classification of, 117-119 

 mutation tests on, 344-345 

 serological relationships of, 117, 775, 

 779 



See also Lagomorpha; Serological 

 tests 

 Race, determination of, 250-255 

 genetic differences in, 250-254 

 geographic, see Subspecies 



Race (Continued) 



microgeographic, see Subspecies, and 

 microgeographic races 



origin of, 358-359 



"pure," 254 



and species, 249, 250-255 

 Race prejudice, 251, 253-254 

 Radiation and mutation formation, 339, 

 390,403,451,455,467 



See also Adaptive radiation; Geo- 

 graphic distribution 

 Radioactivity, see Carbon; Uranium 

 Radiocarbon, see Carbon 

 Radiolarian. 146 

 Radish, 4/9-420 



Rafts, natural, 120, 283, 285-286 

 Rana pipiens, All 

 Rand, 159 



Random survival, see Drift, genetic 

 Ranges, continuous. 273-277 



discontinuous, 269-272 



expansion of, 273 



home, 445 



See also Barriers; Territories 

 Raper,K.B., 451.482 

 Raplianobrassica, 419, 420 

 Rassenkreis, 326-321 

 Rat, 117 



adaptation in. 13-14. 273 



hooded, gene interaction in, 391 



pleiotropic genes in. 351 



rice. 286. 290 



white: nutrition of, 85; training of, 

 and inheritance, 342-343 

 Rate-genes, .v^^t' Genes, rate 

 Ratios, Mendelian, see Mendelian in- 

 heritance 

 Raymond, P. E., 160, 172 

 Reaction range, 421-424 

 Recapitulation, 163. 205, 216 



biochemical. 92. 106 



in classification. 73-75 



in human embryo, 51-65 



interferences with, 65-69 



and metazoa. 69-73 



theory of, 50-5 1 

 Recent period, 137, 194, 195 

 Recessive, see Genes 

 Recognition characters, 493 

 Redwx>od, 194 

 Reed, E. W., 360, 363, 459, 463, 464, 



472,483 

 Reed, S. C, 360. 363, 459, 463, 464, 



472,483 

 Reeve. E. C. R.. 409, 410, 426 

 Regan, T., 314 

 Reindeer. 195. 264 

 Religion, 508-518 



