INDEX. 



715 



Pelobates, 484 



Pelodytes (a genus of frogs), 484 



(a genus of thread worms), 

 164 

 Pelomyxa palustris, 24 

 Pelopffius, 363 

 Peltogaster, 276, 277 

 Pelycosauria, 512 

 Penella, 278 

 Penguin, 541 

 Pennatula aculeata, 86 

 Pentacrinus, 101 

 Peutacta frondosa, anatomy of, 



127 

 Pentastoma, 340 

 Pentremites, 107 

 Perca fluviatilis, 455 

 Perch, 455 



sea, anatomy of, 434 

 Peridinium, 34 

 Peripatus, anatomy of, 335 

 Perisarc, 61 

 Perissodactyla, 600 

 Perla, 347 

 Perophora, 391 

 Petalosticha, 123, 126 

 Petromyzon marinus, 410 



niger, 410 



nigricans, 410 

 Pezophaps solitarius, 547 

 Phalangella flabellans, 186 

 Phalangium, 342 

 Pharyngobranchii, 408 

 Phascolosoma caementarium, 204 



Gouldii, 201 

 Pheronema Annse, 48 

 Phocsena brachycium, 595 



lineata, 595 

 Phoenicopterus ruber, 544 

 Phoronis, 323 

 Phosphorescent annelides, 237 



ascidians, 392 



Hydrozoa, 70 



insects, 355 



Phosphorescent annelides. Pro 

 tozoa, 33 



worms, 217 

 Phrynosoma Douglassii, 508 

 PhylactolEemata, 186 

 Phyllocarida, 291, 805 

 Phyllopoda, 280 

 Physa heterostropha, 245 

 Physalia arethusa, 68 

 Physeter niacrocephahis, 594 

 Physiology, 12 

 Picariae, 550 



Pigeon, anatomy of, 525 

 Pilidium, 317 

 Pill bug, 286, 287 

 Pipa Americana, 485 

 Pipe fish, 461 

 Pirarucu, 442 

 Pisces, characters of, 411, 463 



development of, 418, 488, 

 445 

 Pissodes strobi, 353 

 Plagiostomi, 419 

 Plagusia, 460 

 Planarian worms, 141 



land, 145 



lasso-cells of, 143 



nervous system of, 143 ^ 



parasitic, 145 

 Planaria torva, 141 

 Plant lice, 350 

 Planula, 59 

 Platygaster, 361 

 Platyhelminthes, 141, 162 

 Platyptera, 347 

 Plectognathi, 461 

 Pliohippus, 602 

 Plesiosaurus, 513 

 Plethodon erythronotum, 479 

 Pleurobrachia rhododactyla, 93 

 Pleurolepis pellucidus, 456 

 Pleuroma, 398 

 Pleurum of insects, 309 

 Plumatella, 183 



