384 



Index 



Plasmagenes, 62 



Plataniis occidentalis, 178 



Platijsamia, 186, 190 



Pleiotropy, 64 



Pleistocene, 57, 174, 245, 296 



Plesihippus simpUcidens, 66 



Pliocene, 57, 245 



Pluto, 15 



Poa, 157 



Podocarpiis iistus, 218 



Pollination, 233 



Pohjamia rossi, 276 



Polypeptide chain, 34 



Polypeptides, formation of, 46 



Polyphosphoric acid, 46 



Polyphyletic biomes, 324 



Polyploids, 74 



from natural hybrids, 200 

 Polyploidy, 85, 157, 198, 207, 241 



in plants, 199 



extent, 201 

 Polypodium, 200 

 Polysaccharides, 47 

 Population discontinuity, 124 



oscillations, 126 



size, 150 

 Populations, "inadaptive" stage of, 150 

 Populus tremuloides, 279 

 Position effects, 67 

 Potentilla glandidosa, 205 

 Preadaptation, 111, 151 

 Pre-biological Synthesis, 45 

 Pre-Cambrian, 56, 230 

 Predator-prey system, 229 

 Predatory habit, 217 

 Prerequisite characters, 151 

 Priestley, 2 

 Primeval cell, 30 

 Primula sinensis, 87 

 Pristiphora erichsoni, 87, 136 

 Procecidochares utilis, 228, 290 

 Proline, 52 



Protamines, 34, 38, 40, 52 

 Protective coloration, 102 

 Protective devices, 237 

 Proteinoids, 46 



Proteinoid spherules, 48 



Proteins, 33, 44, 



decomposition of, 48 

 orienting ability, 50 



Protozoa, 44 



Pseudanophthahnus, VIA 



Pseudoalleles, 63 



Psychomyiidae, 93 



Pulse of the earth, 333 



Purines, 38 



Pyrimidines, 39, 47 



Quercus, hybrid swarms, 193 



R 



Rabbits, 144 

 Races, definition, 206 

 Rainfall patterns, 305 

 Rana pipiens, 138 



sylvatica, 172 

 Random mixtures of species, 211 

 Random units, 114 

 Range division, 158 

 Range oscillations, 124 

 Rapid evolution, 286 

 Red fir association, 259 

 Reef communities, 263 

 Regional evolution of biomes, 319 

 Remora, 236 

 Remoropsis pallidas, 237 

 Respiration, 54 

 Reverse evolution, 235 

 Reversibility of evolution, 151 

 Ribonucleic acid, 38 

 Rhipsalis, 323 



Rhopalosiphum maidis, 154 

 Rhyacopliila, 309 

 Rhyacotriton olympicus, 174 

 Ring species, 205 

 RNA, 38 

 Robinia, 186 

 Rock nuthatches, 221 

 Ross's goose, 126 



