INDEX 



545 



Ovum (Continued) 



cleavage of, 47-50, 48, 51, 52, 71 

 human, size of, 51 



See also Egg; Germ cell; Germ 

 plasm; Mendelian inheritance; Poly- 

 ploidy 

 Owl, 293, 322 



color phases in. 375. 433 

 nictitating membrane of, 42 

 as predator. 364-365 

 Oxygen, 79, 80, 5/ , 144, 169 



PA, see Phosphagens 



Paca, 119,260 



Pachycephala pectoral is, 486 



Palate, hard, 172 



Paleocene period, 117, 137, 194, 195, 196 



Paleodictxoptera. 165 



Paleogenesis, see Recapitulation 



Paleomastodon, 211, 212-213 



Paleozoic era, 137. 138. 146-172, 173 



Palestine. Neanderthal man in, 244 



Palms, 194,285, 290 



Palps in insects, 33, 34, 35 



Panamanian current, 291 



Pandorina, IQ). 71,12 



Pantotheria, 137, 190, 191, 192, 220 



Parahippits, 204, 205 



Parallel evolution, 29-30, 102, 105, 113, 



124, 189, 196-197, 262, 301 

 Paramecium, 73 

 Paranthropiis, 235 

 Parapitheciis, 223-224, 225 

 Parasites, 499 

 Park, O., 454, 481 

 Park,T., 454. 481 

 Parsons. C. T., 291 

 Parthenogenesis, 420 

 Patten, B., 52, 59 

 Patterson. B.. 417, 426 

 Patterson, C. 138. 142 

 Paulsen, E. C. 126 

 Pauly, L. K., 121, 125 

 Pavlovsky, O. A., 466, 481 

 PC, see Phosphagens 

 Pea, garden, Mendelian inheritance m, 



380 

 Peanut, 451 



Peiping man, see Pithecanthropus 

 Pelvic bones, 233 

 Pelvic girdle, 43 



of australopithecines, 233 



of gorilla, 2i0 



of Homo sapiens, 229, 230, 233 



of Oreopithecus, 228 



of Ornithischia, 779-180 



of Saurischia, /79-180 



of thecodonts, 178 



Pelycosaur, 171, 177 

 Pennsylvanian period, 137, 164-166 

 Pentadactyl limb, see Limbs 

 Perch, 156 



climbing, 160 

 Period, see Geologic time scale 

 Peripalus, 148, /50 

 Perissodactyla, 196, 197, 269, 310 

 Perkins, R. C. L., 302, 303, 305 

 Permian period, 137, 166-172, 178, 



189 

 Peromvscus, 316-317, 318-319, 320-323, 

 364-365, 472 



gossypinus, 3 1 6 



leucopus. 316, 318,335 



maniculatus, 316, 318, 320, 321, 324- 

 325, 335 



polionotus, 322-323 

 Persons, S., 256. 328. 523 

 Pert, J. H., 126 

 Peruvian current, 288 

 Petrifaction, 127-128 



See also Fossils 

 Phalanger, 262 



flying, 262. 263, 264 

 Pharyngeal pouches, 60, 62, 63, 76 

 Pharynx, 62. 76 

 Pheasant, argus, 492 

 Phenotype 333, 347, 402, 421 

 Phenylthiocarbamide (PTC), 251 

 Phiomia. 21 1,212,213 

 Phosphagens, 102, 103 

 Phosphoarginine (PA), see Phosphagens 

 Phosphocreatine (PC), see Phosphagens 

 Phosphorus, 80 



and energy, 90, 91, 497-498 

 Photosynthesis, see Plants, green, photo- 

 synthesis in 

 Phyletic evolution, 484-485 

 Phylogenetic series, 407, 408, 409 

 Phylogeny, 50, 67, 408 

 Phylum, 311 



Pigment, of blood cells, ,see Chloro- 

 cruorin; Hemoglobin 



of retina, see Retina 



of skin, 104. 252, 253-255, 322-323, 

 394 



and temperature, 276 



visual, see Retina 



See also Melanism 

 Pigmy glider. 263 

 Piltdown man. 140 

 Pineal opening. 171 



See also Eye, pineal 

 Pipilo, erythrophtludmus. 480 



ocai, 480 

 Pirsson, L. V., 148, 155, 156, 157, 158. 

 159, 165,201 



