598 



Pangolin, 563 

 Panopeus, 382 

 I'anorpi<l;c, 422 

 Pansporoblasts, 190 

 Pantopoda, 399 

 Papilio, 433 

 Parabronchi, 538 

 Parachordals, 456 

 Paractinopoda, 308 

 Paradidymis, 489 

 Paradisea, 41 

 Paradoxides, 364 

 Paragastric canal, 234 

 Paraglossa, 406 

 Paragnaths, 377 

 Paramsecium, 191, 195 

 Paranuclein, 57 

 Paranucleus, 192 

 Parapodium, 276, 325 

 Parapophyses, 454 

 Parapterium, 534 

 Parasita, 369 

 Parasitism, 156 

 Parasphenoid, 459 

 Parasuchia, 532 

 Paraxon gland, 293 

 Parenchyma, 239 

 Parietal bones, 459 



eye, 470 



organ, 470 

 Parrots, 544 

 Parthenogenesis, 129 



artificial, 137 

 Partridge, 543 

 Passer, 544 

 Passeres, 544 

 Patagium, 564 

 Patella, 327, 465 

 Patellidae, 333 

 Pathetic nerve, 471 

 Pauropoda, 434 

 Pavement epithelium, 65 

 Pearl, 319 



organs, 493 



oysters, 323 

 Pearls, artificial, 494 

 Pebrine, 191 

 Peccaries, 568 

 Pecora, 568 

 Pecten, 540 

 Pectinatella, 287 

 Pectines, 392 

 Pectinibranchia, 333 

 Pectinidju. 323 

 Pectoral fin, 497 



INDEX 



Pectoral girdle, 464 

 Pedal ganglia, 3 1 2 

 Pedata, 308 

 Pedicellaria, 292 

 Pedicellina, 285 

 Pediculus, 430 

 Pedipalpi, 389, 392 

 Pelagia, 223 

 Pelagic fauna, 164 

 Pelagothuria, 292, 308 

 Pelecanus, 543 

 Pelecypoda, 317 

 Pelican, 543 

 Pelmatozoa, 299 

 Pelobatidae, 520 

 Peltogaster, 374 

 Pelvic fin, 462, 497 



girdle, 464 

 Penella, 370 

 Peneus, 380 

 Penguins, 543 

 Penis, 109, 556 

 Pennaria, 217 

 Pennatula, 230 

 Pentacrinus, 302 

 Pentamera, 424 

 Pentamerus, 290 

 Pentastomum, 157, 397 

 Pentatoma, 428 

 Pentremites, 303 

 Pepsin, 96 

 Perameles, 560 

 Perca, 511 

 Perch, 511 

 Perdix, 543 

 Pereion, 351 

 Pereiopoda, 352 

 Perennibranchiata, 520 

 Perfecting principle, 48 

 Perforata, 180 

 Perforatorium, 72 

 Perla, 414 

 Peromedusac, 224 

 Perophora, 445 

 Peropoda, 531 

 Peribranchial chamber, 440 

 Pericardium, 101, 481 

 Perichaeta, 279 

 Perichondrium, 77 

 Pericolpa, 224 

 Peridinium, 184 

 Perilymph, 479 

 Perineum, 556 

 Periosteum, 77 

 Peripatopsis, 400 



Peripatus, 400 

 Peripharyngeal band, 443 

 Peripheral nervous system, 



"3 



Periphylla, 224 



Periplaneta, 421 

 Periproct, 303 

 Perisarc, 210 

 1 erissodactyla, 568 

 Peristalsis, 96 

 Peristaltic motion, 96 

 Peristome, 208, 303 

 Peritoneum, 99, 481 

 Peritricha, 196 

 Periwinkles, 334 

 Perradii, 124 

 Petaurus, 561 

 Petromyzontes, 493 

 Petrosal, 458 

 Phacellas, 220, 221 

 Phamicopterus, 544 

 Phiethon, 543 

 Phagocata, 242 

 Phalanges, 465 

 Phalangida, 394 

 Phalangistidaa, 561 

 Phalangium, 394 

 Phalarocorax, 543 

 Pharyngeal bones, 496 



bulb, 264 



Pharyngognathi, 510 

 Pharynx, 94, 408, 442, 482 

 Phascalomys, 561 

 Phascolion, 281 

 Phascolosoma, 281 

 Phasianus, 543 

 Phasmida;, 421 

 Phasmomantis, 421 

 Pheasants, 543 

 Phenacodon, 567 

 Phenacodontidae, 569 

 Philichthys, 30 

 Phidippus, 396 

 Philine, 334 

 Philonexidse, 347 

 Phlegethontias, 433 

 Phoca, 565 

 Pholadidne, 325 

 Phoronidea, 287 

 Phosphorescence, 121 

 Phototaxis, 118 

 Phoxichilidium, 399 

 Phragmocone, 341 

 Phronima, 384 

 Phryganea, 422 



