868 



INDEX 



Pellagra. 83, 527, 528 

 I'cUiclc, 95 

 I'elmatozoa, 376, 838 

 Pelvic girdle, 474, 508, 512 

 Pelytosaurs, 465, 722, 723, 840 

 Penetrance, 680 

 Penguins, 480, 481 

 Penis, 123, 210, 569 

 Pennsylvanian period, 723 

 Pepsin, 81, 406, 519 

 Pepsinogen, 519 

 Peptidases, 81 

 Peptide bonds. 28 

 Peptones, 519 

 Peracarida, 836 

 Perca, 437, 839 

 Perch, 437 



structure of, 438 

 Pereiopods, 294 



Pericardial cavity, 86, 244, 402, 551 

 Pericardial sinus, 86 

 Pericardimn, 86, 551 

 Perilymph, 581 

 Periosteum, 57 

 Peripatus, 323, 835 

 Peripheral ganglion, 594 

 Periplaneta, 307 

 Perisarc, 190 

 Perissodactyla, 498, 842 

 Peristalsis, 405, 518 



Peristome, 368 



Peristomium, 267, 271 



Peritoneal cavity, 522 



Peritoneum, 220 



Peritricha, 165, 832 



Peritrophic membrane, 310 



Permeability, 51 



Permian period, 723 



Peroxidase, 67 



Petrifaction, 425, 716 



Petroleum, 756 



Petromyzon, 839 



pH, 23, 539 

 optimum, 70 



Phagocytosis, 541, 542 



Phalangers, 492 



Phalanges, 401, 512 



Phalansterium, 156 



Pharyngeal pouches, 384, 390, 643 



Pharynx, 518, 532 



Phase contrast lenses, 44 



Pheasant, 482 



Phenotype, 655 



Phenylthiocarbamide, 691 



Philodina, 222, 833 



Phoca, 842 



Pholidota, 494, 842 



Phonoreception, 582 



Phoronida, 355, 838 



Phospholipids, 27 



Phosphorus, 614, 759 

 Phosphorylase, 615 

 Photocorynus, 796 

 Photoperiod, 761 

 Photoreceptor, 107, 109, 152, 575 

 Photosynthesis, 78, 756 

 Phrynichida, 836 

 Phrynosoma, 459, 840 

 Phthiriis, 837 

 Phylogeny, 358, 644, 730 

 Phylum, 141, 143 

 Physalia, 191, 833 

 Physiologic isolation. 702 

 Physiological genetics, 732 

 Phytomonadina, 168, 832 

 Phytomonads, 155 



sex cycle in, 168 

 Phytoplankton, 754 

 Pia mater, 599 

 Piciformes, 841 

 Pigeons, 470 

 Pigment cup, 207 

 Pigmentation, 112 

 Pigs, 499 

 Pika, 500 



Pineal body, 416, 576, 597, 634 

 Pineal eye, 428 

 Pinna, 583 

 Pinnipedia, 842 

 Pit vipers, 461 



Pithecanthropus erectus, 744 

 Pituicytes, 622 



Pituitary function, control of, 626 

 Pituitary gland, 419, 428, 597, 620 



blood supply, 621 



development of, 621 



hormones of, 622 

 Placebos, 7 



Placenta, 132, 489, 491, 549, 571, 633, 639 

 Placentation, 133 

 Placodermi, 389, 431, 839 

 Placoid scales, 433 

 Planarians, 204 

 Plankton, 181, 795 

 Plantigrade, 497 

 Planula, 188 

 Plasma, 58, 84, 538 

 Plasma membrane, 14, 34 

 Plasma proteins, 538 

 Plasmodium, 115, 116, 832 

 Plastron, 456 

 Platelets, 58, 60, 541 

 Platyhelminthes, 204-219, 833 

 Platypus, 489, 491 

 Platyrrhine monkeys, 740 

 Platysamia cecropia, 331 

 Plecoptera, 837 

 Pleistocene epoch, 725 

 Pleopods, 294 

 Plesianthropus, 743 



