INDEX. 



715 



Pelobates, 484 



Pelodytes (a genus of frogs), 484 



(a geuus of thread worms), 



122 



Pelomyxa palustris, 24 

 Pelopseus, 363 

 Peltogaster, 276, 277 

 Pelycosauria, 512 

 Penella, 278 

 Penguin, 541 

 Penuatula aculeata, 86 

 Pentacriuu*. 183 

 Pentacta frouclosa, anatomy of, 



209 



Pentastoma, 340 

 Pentrcmites, 189 

 Perca fluviatilis, 455 

 Perch, 455 



sea, anatomy of, 434 

 Peridinium, 34 

 Peripatus, anatomy of, 335 

 Perisarc, 61 

 Perissodactyla, 600 

 Perla, 347 

 Perophora, 391 

 Petalosticlia, 205, 208 

 Petromyzon mariuus, 410 



niger, 410 



nigricans, 410 

 Pezophaps sol i tar i us, 547 

 Phalangella flabellaus, 144 

 Phalangium, 342 

 Pharyngobranchii, 408 

 Phascolosoma caementarium, 162 



Gouldii, 159 

 Pheronema Annae, 48 

 Phocoena brachycium, 595 



liueata, 595 



Phcenicopterus ruber, 544 

 Phorouis, 161 

 Phosphorescent annelides, 175 



ascidians, 392 



Hydrozoa. 70 



insects, 355 



Phosphorescent aunelides, Pro 

 tozoa, 33 



worms, 175 



Phrynosoma Douglassii, 503 

 Phylactolsemata, 144 

 Phyllocarida, 291, 305 

 Phyllopoda, 280 

 Physa heterostroplia, 245 

 Physalia arethusa, 68 

 Physeter macrocephalus, 594 

 Physiology, 12 

 Picnrise, 550 



Pigeon, anaiomy of, 525 

 Pilidium, 156 

 Pill bug, 286, 287 

 Pipa Americana, 485 

 Pipe fish, 461 

 Pirarucu, 442 

 Pisces, characters of, 411, 463 



development of, 418, 432, 



445 



Pissodes strobi, 352 

 Plagiostomi, 419 

 Plagtisia, 460 

 Planarian worms, 99 



land, 103 



lasso-cells of, 101 



nervous system of, 101 



parasitic, 103 

 Planaria torva, 101 

 Plant lice, 350 

 Planula, 59 

 Platygaster, 361 

 Platyhelminthes, 99, 120 

 Platyptera, 347 

 Plectognathi, 461 

 Pliohippus, 602 

 Plesiosaunis, 513 

 Plethodon erythronotum, 479 

 Pleurobrachia rhododactyla, 93 

 Pleurolepis pellucidus, 456 

 Pleuroma, 298 

 Pleurum of insects, 309 

 Plumatella, 140 



