744 



INDEX 



Ovis, 724 



Ovotestis, 295 



Ovum, 8 ; of Hydra, 53 



Owl, 705 



Ox, 695, 697 



Oxygen, 3, 17 



Oyster, 284, 292, 298, 308 



Pachytylus, 247, 251 



Palatal flap, 573, 580 



Palatine bone,, 477, 531, 617 



Palatine foramina, 641 



Palatine plates, 471 



Palato-pterygo-quadrate bar, 456 



Palinurus, 198, 199 



Palp, 235 



Palpal organ, 261, 265 



Palpons, 67 



Pancreas, 429 



Pangolin, 668 



Panther, 676 



Pantopoda, 175, 283 



Papilla, 638 



Parachordals, 414, 447 



Paragastric canals, 80 



Paraglossa, 236 



Paramecium, 39, 40, 47; conjugation 



of, 41 



Paraneuroptera, 280 

 Parapodia, 158 

 Parapophyses, 414 

 Parasite, 101 

 Parasitic, 44, 101 

 Parenchyma, 94 

 Parethmoid, 476, 477 

 Parietal peritoneum, 152 

 Parietals, 479, 530, 531 

 Parotid glands, 625, 655 

 Parrot, 635 

 Passer, 635 



Passeriformes, 633, 635 

 Patella, 289, 290, 296, 324 

 Patheticus nerves, 425 

 Pathogenic, 34 

 Paunch, 692 

 Pavo, 610 

 Peacock, 610 

 Pea-urchin, 356 - 

 Peccary, 691 

 Pecten, 303, 308 

 Pectines, 269 

 Pectinibranchiata, 324 

 Pectoral girdle, 459, 460 

 Pectoral muscles, 610 

 Pedal ganglion, 343 

 Pedalion, 126 

 Pedicellina, 380 

 Pedicellariae, 336, 346, 348 

 Pedipalp, 261, 262 

 Pelagic, 384 

 Pelagic organisms, 81 



Pelagothuria, 369 



Pelagothuriidae, 369 



Pelecanus, 634 



Pelecypoda, 298, 310, 324 



Pelican, 634 



Pelmatozoa, 367 



Pelobates, 559, 562 



Pelobatidae, 559, 562 



Pelvic girdle, 460, 613 



Penaeus, 219 



Penguin, 634 



Penis, 164, 295, 582 



Pentacrinoids, 365 



Pentacrinus, 365 



Pentadactyle, 520 



Pepsin, 429 



Peracarida, 217-221, 222 



Peraeopods, 214 



Perameles, 718 



Peramelidae, 662, 718. 



Perca, 493, 515 



Percesoces, 492, 514 



Perches, 493 



Percidae, 493, 515 



Percomorphi, 493, 515 



Pericardium, 389, 408, 430, 448 



Perihaemal-canals, 336, 353; -rings, 



336; -tubes, 389 

 Periosteum, 650 

 Periostracum, 299 

 Periotic, 649 

 Peripatus, 175, 196, 225, 227, 242, 



264, 279 



Peripharyngeal band, 400, 408 

 Periplaneta, 233 

 Periproct, 346 

 Perisarc, 60 



Perissodactyla, -687, 688, 723 

 Peristalsis, 153 

 Peristome, 35, 327, 346 

 Peritoneum, 141 

 Peritricha, 47 

 Peritrichous, 39 

 Periwinkle, 284, 286 

 Perspiration, 638 

 Pes, 520 



Petaloid ambulacra, 356 

 Petrel, 634 



Petrogale, 660, 664, 719 

 Petrohyoid, 527 

 Petromyzon, 444, 445, 446, 448 

 Petromyzontidae, 448 

 Phalanger, 718 

 Phalangeridae, 663, 718 

 Phalanges, 609 

 Phalangid, 266, 267 

 Phalangida, 266, 282 

 Phaneroglossa, 558, 562 

 Pharyngeal bones, 479 

 Pharyngo-branchial segment, 457 

 Pharynx, 32, 33, 96, 128, 136, 141, 



428; of Amphioxus, 401 



