716 
Pneumophora, 134 
Podostomata, 295 
Podura, 344 
Pogonias chromis, 448 
Pogy, 450 
Poisonous batrachians, 475 
jelly fish, 67 
snakes, 497, 499 
Polycelis, 102 
Polycladus Gayi, 101 
Polydora, development of, 171 
Polykrikos, 37 
Polymorphism, 654 
in insects, 348 . 
Polyodon folium, 428 
Polypedates, 484 
Polypide, 181 
Polyps, coral, 74 
Polypterus bichir, 428 
Senegalus, 428 
Polystome, 110 
Polystomum integerrimum, 111 
Polyzoa, development of, 143 
structure of, 188, 146 
Polyzoarium, 139 
Pomatomus saltatrix, 455 
Pomolobus pseudoharengus, 450 
Pomotis, 455 
Porcellio, 286, 290 
Porcupine fish, 462 
Porifera, 42, 49 
Porphyrio cceerulescens, 545 
Porpoise, 595 
Porsana Carolina, 544 
Portuguese man-of-war, 69 
Potamotrygon, 424 
Pourtalesia, 206 
Prestwichia rotundatus, 302 
Primates, 618, 629 
Primnoa reseda, 86 
Pristis antiquorum, 421 
Perroteli, 421 
Proboscidea, 597, 629 
Procyon lotor, 615 
INDEX, 
Proglottis of tape worms, 156 
trematode worms, 150 
Prorhynchus, 196 
Proscolex of tape-worms, 114 
trematode worms, 108 
Prosimiz, 618 
Protameeba, 19 
Protaster, 193 
Protective resemblance, 487, 675 
Proteida, 478, 488 
Proteus, 478 
Protista, 2 
Protohippus, 602 
Protomonas amyli, 19 
Protomyxa, 19 
Protomyxa aurantiaca, 19 
Protoplasm, 5 
Protoplasta, 31 
Protopterus annectens, 464 
Protozoa, 17, 41 
contractile vesicles of, 32 
Pseudemys, 510 : 
Pseudes paradoxa, 487 
Pseudobranchus striatus, 478 
Pseudocrinus, 190 
Pseudofilaria, young of gregarina, 
30 
Pseudopleuronectes Americanus, 
460 
Pseudopodia, 23 
Pseudopus, 502 
Psolus ephippifer, 215 
Psychology, 12 
Ptarmigan, 546 
Pteranodon, 517 
Pteraster, 196 
Pterodactyle, 516 
Pteropoda, 238, 252 
Pterosauria, 516, 517 
Pterotrachea coronata, 271 
Ptyelus lineatus, 350 
Puffer fish, 462 
Pulex irritans, 356 
Pulmonata, 245 
