692 



INDEX. 



Polynesia, 177 



Polynoe, 313 



Polynoidse, 313 



Polyodon, 573 



Polyodontida;. 573 



Polyp, 230 



Polyphemid^, 417 



Polypid, 322 



Polypodium, 239, 241 



Polyprododonta, 633 



Polypterus, 573 



Polypterus tail, 41 



Polyscelis, 271 



Polyspermy, 148 



Polystomese, 273 



Polystomella, 198 



Polystomum, 273, 274 



Polythalamia, 196, 198 



Polytroche, 309 



Polyzoa, 321 



Poneridee, 4S7 



Pons Varolii, 623 



Pontobdella, 321 



Pontodrilus, 308 



Pontella, ^21 



Porcellanidse, 437 



Porcellain crabs, 437 



Porcellio, 442 



Porcellio, nervous s}'sten\ of, 124 



Porcupines, 639 



Porella, 324 



Pori abdominales, 546 



Porifera, 221 



Porites, 261 



Porpita. 245 



Portal vein, 548 



Portuguese man-of-war. 245 



Portunidee, 437 



Porus branchialis, 503 



Postabdomen. 401 



Postfrontal bone, 526, 590 



Postorbital bone, 590 



Postpernianent dentition, 625 



Potato beetle, 485 



Powder down, 603 



Prjeclavia, 528, 622 



Prascoces, 612 



Prairie dogs, 639 



Praya, 166, 244 

 Prefrontal bone, 526, 590 

 Prelacteal dentition, 625 

 Premaxillary bone, 525 

 Premolar teeth, 626 

 Presphenoid bone, 522 

 Priapuliiidea, 317 

 Priapulus, 317 

 Primaries, 604 

 Primary bone, 519 

 Primary yolk. 80 

 Primates, 649 

 Primnoa, 259 

 Primordial cranium, 521 

 Principal tissue, 99 

 Priodon, 635 

 Pristidae, 572 

 Pristis, 572 

 Proboscidia, 643 

 Proboscis, 373 

 Procoelous, 519 

 Procoracoid, 528 

 Proctodaeum, 104 

 Procyon, 647 

 Proechidna, 631, 632 

 Proglottids, 278 

 Prefect, 466 



Progression, principle of, 55 

 Prolegs, 475 

 Promorpholog\-, 133 

 Pronephric duct, 550 

 Pronephros, 550 

 Prong horn, 643 

 Pronotum, 462 

 Pronucleus, 149 

 Proofs of phylogeny, 32 

 Proostracum, 389 

 Prootic bone, 522 

 Propodium, 369 

 Propterygium, 529 

 Prorostomus, 644 

 Prosencephalon. 533 

 Prosimice, 64S 

 Prosobranchia, 378 

 Prosternum, 528 

 Prostoma, 156 

 Protamoeba, 189 

 Proteroglypha, 601 



