724 



INDEX 



ships, 419; respiratory system, 417, 

 418; sense organs, 417, 418 ; skeleton, 

 416 ; urinogenital system, 417, 419. 



Petromyzontia, 420. 



Phalacrocoracidce, 590, 60 1 ; Phalacro- 

 corax, 601, 602. 



Phalanger, 642, 649; Phalangeridce, 649. 



Phalanges, 404, 497, 576, 582. 



Phalangidea, 379; Phalangium, 379. 



Phalarope, 607. 



Phanerocephala, 236. 



Phaneroglossa, 512. 



Pharynx, 152, 157, 397, 405, 438, 638. 



Phascolomyida;, 649. 



Phasianida, 590, 606. 



Phasmida, 343, 344. 



P hasmomantis , 343. 



Pheasant, 590. 



Philodina, 182. 



Philodryas, 539. 



Phoca, 643, 657 ; Phocida, 657. 



Phoccena, 645. 



Phoenicopteridce, 590, 602 ; Phcenicopterus, 

 602. 



Pholidota, 643, 66 1. 



Phoronidea, 185 ; Phoronis, 185. 



Phosphorescent organs, 473. 



Photosynthesis, 20-21. 



Phototropism, 36, 37, 38, 43, 229. 



Phryniscus, 512. 



Phrynosoma, 537, 555. 



Phthirius, 345. 



Phyllobates, 512. 



Phyltodactylus, 552. 



Phyllopoda, 292, 293, 299. 



Phyllostomida, 651. 



Phylloxera, 346. 



Phylogeny, 26, 302 ; of vertebrates, 693- 

 696. 



Phylum, 21, 23-25. 



Physa, 258, 259. 



Physalia, 125, 126. 



Physeter, 675. 



Physeterida, 674. 



Physiology, 26. 



Phytophaga, 362. 



Pia mater, 504. 



Pica, 643. 



Picidce, 591, 614. 



Pierida, 352; Pieris, 352. 



Pig, 667, 685; guinea, 643. 



Pigeon, 575-588; circulatory system, 



583 ; digestive system, 583 ; excretory 

 system, 596; external features, 575; 

 feathers, 577; muscular system, 582; 

 nervous system, 587 ; reproductive 

 system, 586 ; respiratory system, 585 ; 

 sense organs, 587 ; skeleton, 579. 



Pike, 444, 462, 267, 475, 476. 



Pilidium, 178, 233. 



Pincher, 278, 280. 



Pinna, 411, 633, 640. 



Pinnipedia, 643, 652, 656. 



Pinnotheres, 297. 



Pinnule, 209, 210. 



Pipa, 512, 518. 



Piroplasma, 381. 



Pisces, 432-476, 694. 



Pithecanthropus, 666, 696. 



Pithecia, 664. 



Pituitary body, 417, 419. 



Placenta, 641, 680, 681, 682. 



Placentalia, 642, 694, 696. 



Plagionotus, 363. 



Plague, 360, 371. 



Plaice, 469. 



Planaria, 150, 151-155. 



Plankton, 6. 



Planorbis, 258, 259. 



Plantigrade, 634. 



Planula, 104, 120, 121, 124. 



Plasmodium, 50^51, 52. 



Plasmosome, 13. 



Plastids, 13, 14. 



Plastron, 528, 529. 



Platanistida, 674. 



Plates, of sea urchin, 202, 203. 



Platurus, 539. 



Platyhelminthes, 23, 25, 150-168. 



Platypus, 646. 



Platysamia, 353. 



Platysternida, 535 ; Platy sternum, 535. 



Plautus, 609. 



Plecoptera, 337, 340. 



Pleistocene, 686, 697. 



Pleopods, 277, 278, 281. 



Plethodon, 511, 517; Plethodontida:, 517. 



Pleurobrachia, 146. 



Pleurobranchia;, 284. 



Pleuron, 276, 277. 



Pletirocera, 259. 



Pleurodira, 535. 



Pleuronectidce, 444, 469-470. 



Pleurum, 330. 



