INDEX. 



693 



Proteroglyphic tooth, 600 

 Proteus, 587 

 Prothorax, 462 

 Protobranchiata, 365 

 Protista, 186 

 Protocaris, 416 

 Protocerebrum, 462, 468 

 Protoconchise, 365 

 Protodonta, 632 

 Protohydra, 239, 241 

 Protomerite, 214 

 Protonemertini, 291 

 Protonephridia, 115 

 Protoplasm, 61, 80 

 Protoplasm, discovery of, 59 

 Protoplasm, movement of, 62 

 Protopterus, 579 

 Prototheria, 631 

 Protovertebrse, 531 

 Protozoa, 183 

 Prortacheata, 408, 456 

 Protula, 313 

 Proventriculus, 467 

 Psammonyx, 198 

 Pseudelectric organs, 563 

 Pseudobranch, 570 

 Pseudocuticula, 597 

 Pseudolamellibranchiata, 365 

 Pseudonavicellae, 215 

 Pseudoneuroptera, 477 

 Pseudopodia, 187 

 Pseudoscorpii, 450 

 Pseudosuchia, 602 

 Psittaci, 616 

 Psittacus, 616 

 Psocidae, 479 

 Psolus, 349 

 Psorosperms, 217 

 Pteranodon, 602 

 Pteraspis, 557 

 Pterichthys, 557 

 Pterodactylia, 602 

 Pteronarcys, 479 

 Pteropoda, 382 

 Pteropod ooze, 382 

 Pteropus, 638 

 Pterosauria, 602 

 Pterotic bone, 522, 560 



Pterotracheidae, 380 

 Pterygoid bone, 525 

 Pterygoid process, 622 

 Pterygoquadrate, 524 

 Pterygotus, 444 

 Pterylae. 603 

 Pubic bone, 528 

 Pugettia, 437 

 Pulex, 493, 494 

 Pulmonata, 383 

 Pulmonary artery, 549 

 Pulmonary circulation, 549 

 Pulmonary vein, 549 

 Pulp cavity, 515 

 Pulvilla, 493 

 Puma, 647 

 Pupa, 383 

 Pupae, 474 

 Pupipara, 493 

 Purpura, 379, 380 

 Putorius, 647 

 Pycnogonida, 456 

 Pygidium, 414 

 Pyloric caeca, 565 

 Pylorus, 546 

 Pyrosoma, 510 

 Pyrula, 373 

 Python, 601 

 Pythonaster, 337 

 Pythonomorpha, 600 



Quadrula, 196, 198 

 Quadrumana, 650 

 Quadrate bone, 525 

 Quahog, 368 

 Quail, 614 

 Quaternary, 181 



Raccoon, 647 

 Rachis, 603 

 Racemose glands, 77 

 Radial canals, 235, 331 

 Radial symmetry, 135 

 Radiale, 529 

 Radialia, 330, 340, 527 

 Radiata, 228, 329 

 Radiolaria, 192 

 Radius, 529 



