940 



INDEX 



Pathology, 23 



Paurometabolous, 308 



Pavlov. S52 



jr'tjaris, ai tifical, 255 



Peas, dwarf. 822 



Pecari angulatus, javelina. 632 



Peccary, 630, 632, 787 



Pecten, 357, 608 



Pectinatella, 186, 187 



Pectine, 298 



Pectoral girdle, toad. 542 



muscles, 524 

 Pedal ganglion, 245 

 Pedicellariae, 218. 226. 229 

 Pediculati, suborder, 455 

 Pediculus, louse, 738 

 Pedigree chart. 843 

 Pedipalpi, 292 



order, 266 

 Peduncle, 187 

 Pelagic animals, 769 

 Pelecaniformes, order. 587 

 Pelecypoda, 256 

 Pellicle, 94 



Pelmatohydra oligactis, 144 

 Pelobatidae, family, 485 

 Pelvic girdle, frog, 521 

 Pemphigus betae. 318 

 Penguins. 586 

 Penial setae. 181 

 Penis, 246, 261 

 Pennatula, 144 

 Pennatulacea, order, 143 

 Pentacrinus. 225 

 Pentastomoids. 292 

 Pentatomidae. family, 318 



Pepsinogen, 383 

 Peranema. 66 



Perca flavescens, 454. 457 



Perch. 411. 454 



internal structure, 460 

 skull, 467 

 yellow, 457 



Percidae, family, 454 



Percomorphi, suborder, 452 



Pereiopods. 270 



Pericardial cavity, 376 

 sinus, 272, 274 



Pericardium. 567, 604, 649 

 of frog. 510 



Perichondrium, 691 



Pericolpa, 137 



Periganglionic gland, 528 



Perihemal space, 229 



Perilymph. 530 



Perioral membrane. 227 



Periosteum, 378, 644 



Periostracum. 249 



Peripatus. 265. 287, 865 



Periphylla, 137 



Periplaneta americana, 315 



Periproct. 221 



Perisarc, 132 



Perissodactvla, order, 633 



Peristalsis, 382 



Peristaltic contractions. 151, 196 



Peristome. 227 



Peristomium. 197 



Peritoneum. 376 



Peritrichida, 71 



Perivisceral coelom. 229 

 space. 274 



Perla modesta. 321 



Peromedusae, order, 137 



Perophora, a tunicate. 772 



Pessulus. 604 



Petrels. 5S7 



Petromvzon. 413 

 marinus, 415 



Petromyzontla, subclass, 412 



Petropedetes newtoni, 480 



Phacus. 66 



Phagocytosis, 395 



Phalanges, 611 



Phalangida, order, 266, 295. 299 



Phalanx. 611 



Phalaropes, 591 



Pharyngeal clefts, 360 



Pharyngobranchial, 428 



Phasmidae, family, 318 



Pheasants. 590 



Phenotype, 826 



Phidippus workmanii, 296 



Philodina, 190 



Philomycus carolinensis, 240 



Pliocaena phocaen i, porpoise, 634 



Phoenicopteridae, family, 588 



Phoenicopturus ruber. 588 



Pholcidae, laniily, 2^7 



Pholcids. 297 



Pholcus phalangoides, 297 



Pholidota, order, 621 



Phoronidea, 27 



Phosphorescent organs, 771 



Photoelectron. 707 



Photons, 698 



Photosynthesis, 28, 29, 700 



Phototropism. 77 



Phrynosoma, 552 



circulatory system. 566 

 I digestive system, .563 

 ear, 574 



muscular system, 576 

 nervous system. 573 

 respiratory system. 566 

 skeleton. 574 

 skull. 575 



Phthirius pubius. crab louse, 738 



Phyllophaga, 354 



anxia. 355 

 Phylogenetic advances, arthropoda. 286 

 relations of animals, 863 



Phylogeny. 23. 285 



Physa anatina. 238 

 eggs, 247 

 gyrina. 237 

 humerosa. 238 



Physalia, 136, 137 



Physeter catodon, sperm whale, 634 



Physiology, 22 



Physoclisti. 447 



Physocyclus, 297 



Physostomi. 447 



Phytonomus posticus. 324 



Pia mater, 526, 650 



Piciformes. order. 594 



Pickerels. 450 



"Pigeon milk," 591, 602 



Pigeons, 591 



Pigment cells, 474 



Pigmentation of skin, 674 



Pigs, 630 



Pikas, 627 



Pikes 450 



Pilidium larva. 162. 163 



Pill bug, 264. 265 



Pine scale. 320 



Pineal body of fish, 469 



Pinna. 639 



Pinnipedia, 628 



Pinnules. 224 



Pinworm, 176 



Pipa. Amazonian frog, 480 



Pipefish, 451 



Pipunculus subvirescens, 332 



Plsaster, 218 

 ochraceus, 227 



I 



