INDEX 



639 



Parazoa, 130 



Parelephas, 622 



Parenchyma, 160 



Parental generation (see P generation) 



Parker, G. H., 335 



Parotoid gland, 373 



Parrakeets, 423 



Parrots, 416, 423 



Parthenogenesis, 107, 268, 290, 471, 568 



artificial, 114-115 

 Parthenogonidia, 87 

 Partial cleavage, 119, 120 

 Partial pressures, law, 491 

 Pasteur, 27, 83, 583, 584 

 Pasteurization, 583 

 Patella, 325, 405 

 Patella, eyespot, 227 



trochophore, 230 

 Pathogenic protozoans, 88 

 Pathology, 5 



Pavement epithelium, 98, 99 

 Pea fowls, 416, 423 

 Pear leaf blister mite, 308 

 Pearl button industry, 230, 232 , 

 Pearl essence, 364 

 Pearl shell buttons, 230 

 Pearls, 228, 232, 364 

 Pearly nautilus, 228 

 Peas, Mendel's work, 561 

 Peat bog fossils, 538 

 P6brine, 83, 583 

 Pecten, 408, 427 

 Pectine, 306 

 Pectoral arch, 367 

 Pectoral fins, 322, 344, 352, 354 

 Pectoral girdle. 326, 451 

 Pedal ganglion, 214, 217 

 Pedicellariae, 195, 196, 201, 207 

 Pedipalpus, 302, 303, 306 



Pedogenesis, 108, 380 



Peduncle, 193, 302 



Peking man, 452 



Pelagic fauna, 511 



Pelecypoda, 221, 225, 541 



Pelican, beak, 412 



Pellicle, 69, 70, 464 



Pelvic fins, 322, 344, 362, 354 



Pelvic girdle, 326, 350 



Pelvic region, 322 



Pelvis, 326, 326, 327, 451 



Pen, squid, 226 



Penaeus, 270, 271 



Penaeus semisulcatus, 271 



Penguins, 414 



Penis, 163 



Pennaria, 146 



Pennsylvanian period, 539, 542, 543 



Peper coral, 153 



Pepsin, 328, 329, 489, 492 



Pepsinogen, 492 



Peptones, 329 



Perca flavescens, 362 



Perca scale, 363 



Perch, 362 



climbing, 364 



scale, 353 

 Perching birds, 414 

 Perching mechanism, 414 

 Perennibranchs, 370 

 Peribranchial vesicle, 318 

 Pericardial cavity, 214, 216, 303, 323, 427 

 Pericardial glands, 494 

 Pericardial sinus, 259 

 Pericardium, 267 

 Perioral membrane, 195 

 Periosteum, 106, 326, 327 

 Periostracum, 213, 214 

 Peripatus, 273, 527 

 Peripheral ganglia, 333 

 Peripheral nervous system, 238, 333 

 Perisarc, 464 

 Perissodactyla, 441 

 Peristalsis, 236, 489 

 Peristomal tentacles, 248 

 Peristome, 69, 195 

 Peristomium, 248 

 Peritoneum, 196, 198, 235, 323 

 Permian period, 539, 543 

 Personality, 481 

 Perspiration, 467, 484, 491 

 Petrifaction, 538 

 Petromyzon marinus, 341 

 Petromyzontia, 341 

 Pfluger, 27 

 Phagocytes, 518 

 Phalangers, 433 

 Phalanges, 327, 404 

 Phalarope, 420 

 Pharyngeal clefts, 468 

 Pharyngeal slits, 312, 314, 317, 319, 320, 378, 



468, 648, 575 

 Pharynx, 160, 168, 235, 237, 238, 281, 282, 317- 



320, 323, 328 

 Pheasants, 416, 535 



foot, 413 



ring-necked, beak, 412 

 Pheidole instabilis, 299 

 Phenotype, 556 

 Phenotypic ratios, 660, 561 

 Philodina roseola, 189 

 Phosphorus, 19, 488 

 Phosphorus cycle, 488 

 Photostomias guernei, 363 

 Photosynthesis, 42, 43, 486 

 Phototropism, 56, 67, 141, 239, 377 

 Phyla, 59, 571, 573, 576, 577 

 Phyla table, 574-575 

 Phyllium, 613 

 Phylogenetic series, 544 

 Phylogenetic tree, 573, 676 

 Phylogeny, 272 

 Physalia pelagica, 160 

 Physical basis of life, 24 

 Physical environment, 516 

 Physical factors, 507 

 Physics, 8 



Physiological differentiation, 95 

 Physiological life histories, 506 



