720 



Index 



Prothrombin, 179, 180 



Protochordates, 45, 561 



Proton, 25, 28 



Protonephridial excretory system, 403, 



421, 439 

 Protoplasm, 35-36, 266 

 Protoplasmic bridges, 356 

 Protoplast, 267 

 Protopodite, 495, 496, 498 

 Protopterus, 583, 591, 593 

 Protostomia, 646 

 Prototheria, 627, 629 

 Protozoa, 44, 45, 346, 349-374, 644 



characteristics, 350-352 



classification, 44, 45, 346, 352-353 



Protozoea, 508 



Protozoology, 21 



Protractor, 472 



Protura, 536 



Proventriculus, 519, 523, 524 



Pseudemys, 605, 606 



Pseudocoel, 346, 424, 453 



Pseudocoelomate, 346, 347 



Pseudopodium, 350, 352, 359 



Pseudoscorpion, 513, 515 



Psittaciformes, 625 



Psocid, 538 



Pteranodon, 614 



Pterocera, 476 



Pterophryne, 592 



Pteropod, 470, 476 



Pterosauria, 603, 613, 614, 615 



Pterygoids, 57 



Pterygota, 538-540 



Ptyalin, 131, 138, 139 



Puberty, 110, 151,241,259,262 



Pubic symphysis, 110, 242 



Pubis, 58, 110 



Puffbird, 625 



Pulmo-cutaneous artery, 64 



Pulmonary artery, 65, 162, 164, 166 



circulation, 161, 163, 166 



vein, 64, 66, 164, 166 



Pulmonate snail, 470 

 Pulp cavity, 86, 87 

 Pulse pressure, 175 

 rate, 211, 230 



Pulvillus, 522, 523 

 Punnett square, 299, 300 

 Pupa, 520 

 Pupil, 217, 218 

 Purkinje, 266 

 Pycnogonida, 489, 515 

 Pygidium, 509, 510 

 Pyloric stomach, 61, 132, 133, 135 

 valve, 61, 132, 142, 143 



Pyramid, renal, 188 



Q 



Quadratoj ugal bone, 57 

 Quadruped, 109, 110 

 Quahog (see Venus), 476 

 Quail, 620, 622, 623, 625 

 Quaternary period, 342 

 Queen, 532, 533, 534, 535 

 Quill, 76 



R 



Rabbit, 135, 241, 630, 635, 636, 671 



parasites of, 363 

 Racoon, 630, 638 



Radial canal, of coelenterates, 393, 395 

 of echinoderms, 546, 552 

 of sponges, 378, 379 

 Radial symmetry, 345 

 Radiata, 347 

 Radiating canal, 369 

 Radiation, 311, 312, 316 

 Radical, 30 

 Radioactive iodine, 229 



isotope, 27 

 Radiolaria, 362 

 Radio-ulna, 58 

 Radius, 109 

 Radula, 467, 470 

 Rail, 625 



Rain forest, temperate, 651, 657 

 tropical, 651, 655-656 

 winter, 651, 656 

 Rainbow trout, 590 

 Raja, 576, 580 



Rana catesbeiana, 48, 53, 56, 57, 59, 62, 

 65, 67, 70, 71, 73, 596, 598, 599 

 pipiens, 47-74, 598, 599, 601 

 classification, 596 

 efi'ect of isolation, 328-329 

 Ranidae, 596, 598 

 Rapids communities, 663 

 Rat, 44, 46, 81, 85, 88, 107, 167, 188, 

 241, 630 

 gestation period, 292 

 reproduction, 256, 263 

 Rate, basal metabolic, 157 

 blood flow. 174-175 

 digestion, 211 

 fat deposition, 228 

 heart beat, 174, 193, 228, 229, 230, 



234 

 metabolism, 228, 229, 230 

 metamorphosis, 231 

 nerve conduction, 195, 232 

 pulse, 211, 230 



respiratory, 155-156, 229, 230 

 Rattlesnake, 91, 609, 610 

 Rattus norvegicus, 44, 636 (see also 

 Rat) 



