714 



INDEX 



Ova, 79 



Ovarian vein, 337 



Ovary, 105, 116, 135, HO, 143, 

 144, 150, 151, 152, 172, 

 180, 208 



frog, 341 



human, 342, 553 

 Overproduction, 649 

 Oviduct, 135, 144, 150, 151, 152, 



172, 173, 180, 341, 342 

 Oviparous, 80, 564 

 Ovipositor, 231, 234 

 Ovis, 491 

 Ovotestis, 292 

 Ovoviviparous, 80, 153, 564 

 Ovum, 119 

 Owl, 453, 461 

 Owlet moth, 264 

 Oxidation, 19 

 Oxygen, 87, 541 



debt, 508 

 Oxygenated blood, 340 

 Oxyhemoglobin, 526 

 Oyster, 296, 299 



catchers, 461 



drill, 293 



Pachylomerides, 278 

 Pacinian corpuscle, 548 

 Paedogenesis, 561 

 PaguTus, 218 

 Pain, 548 

 Painted turtle, 411 

 Palate, 515 

 Palatine, 344, 500 

 artery, 336, 338 

 Palearctic realm, 650 

 Paleontology, 10 

 Paleozoic amphibians, 400 

 era, 616, 617 

 invertebrates, 617 

 Palmaris longus, 467 

 Paloloworm, 186, 187, 195 

 Palp, 232, 247 

 Palpigrada, 268, 279 

 Pan, 489, 490 

 Pancreas, 331, 370, 439, 515, 



517, 548,553 

 Pancreatic amylase, 517 

 duct, 331,515, 553 

 gland cells, 553 

 juice, 517 

 Pandorina, 74, 561, 562 

 Pangolins, 482 

 PanoTpa, 264 

 Panther, 486 

 Pantostomatida, 49 

 Pantothenic acid vitamin, 523 

 Panulirus, 218 

 Papilio, 250 

 Papilionidae, 265 



Papilla, 224 

 Paragnaths, 184 

 Paragonimus, 145 

 Paragordius, 160, 162 

 Parakeets, 461 

 Paralysis, tick, 277 

 Paramecium, 31, 54-64, 55 

 autogamy, 63 

 avoiding reaction, 59 

 behavior, 59-61,60 

 binary fission, 61, 62 

 conjugation, 61-64, 63 

 cyclosis, 58 

 digestion, 58 

 division, 62 

 excretion, 59 

 food, 55 



locomotion, 55, 59 

 mating types, 63 

 morphology, 54 

 nutrition, 57 

 physiology, 57 

 reactions to stimuli, 60 

 reproduction, 61-64, 62, 63 

 respiration, 59 

 spiral path, 55 

 structure, 55 

 water regulation, 58 

 Paramvlum body, 43 

 Parapodia, 183, 184, 186 

 Parasite, 636 

 chain, 635 



-host relationship, 256 

 Parasitic animals, 6 

 . Ascaris, 151 

 cestoda, 138 

 insects, 256, 257 

 liver fluke, 1 39 

 mites, 275 

 Protozoa, 50 



roundworms of man, 155 

 ticks, 275 

 Trematoda, 1 38 

 Parasitism, 639, 641 

 evolution, 641 

 origin, 641 

 Parasitology, 10 

 Parasphenoid, 344 

 Parasympathetic nervous system, 



555 

 Parathyroids, 552, 553 

 Parenchyma, 137 

 Parental care, 569 

 birds, 570 

 eggs, 569 

 mammals, 570 

 young, 570 

 Paridae, 462 

 Parietal, 500, 502 

 eye, 413 

 layer, 356 

 pleura, 537 

 Parotid duct, 516 

 gland, 516 



Parrot, 461 

 fishes, 395 



Parthenogenesis, 165, 560, 561 

 artificial, 311, 560, 561 



Parthenogenetic eggs, 165, 560 



Partridge, 461 



Paruhdae, 462 



Passenger pigeon, 459 



Passeriformes, 433, 456, 462 



Passerine birds, 456 



Pasteur, 602, 657 



Patella, 437, 467, 501 



Pathology, 10 



Pavo, 456 



Pea height inheritance, 581 



Peacock, 456 



Pearl, 284, 297, 299 



Pearly nautilus, 296 



Peccaries, 487 



Pecten, 245, 246, 299 



Pectoral, fin, 368 

 girdle, 345, 436, 502 



Pectoralis, 348 



major, 438, 505, 506 

 minor, 439, 467, 506 



Pedicellaria, 303, 307, 309 



Pediculatida, 395 



Pedipalpi, 268, 269, 274, 277 



Pediculus, 263 



Peduncle, 166, 269 



Peking man, 625 



Pelagic animals, 646 

 environment, 642 



Pelecaniformes, 461 



Pelecanus, 461 



Pelecvpoda, 282, 283, 300 



Pelican, 452, 461 



Pellagra, 523 



Pellicle, 43, 55, 56 



Pelmatohydra, 103 



Pelobatidae, 397, 404 



Pelomyxa, 39 



Pelvic cavity, 331 

 fins, 368,' 369 

 girdle, 345, 438, 502 

 vein, 338 



Pelvis, kidney, 539 



Pen, squid, 293, 294 



Penetrance gene, 587 



Penetrant, 109 



Penis, 135, 140, 192, 342 



Pennatula, 128 



Pentastomida, 268, 279 



Pepsin, 517, 521 



Perca fla\'escens, 378-385 

 anatomy, 378, 380 

 circulatory system, 383 

 digestive system, 381 

 excretory system, 384 

 external anatomy, 378, 380 

 locomotor organs, 380 

 muscular system, 381 

 nervous system, 384 

 reproductive system, 385 



