INDEX 



633 



Pepsin, peptone, 74 



Pericardial gland, 406 



Pericardial sinus, 376 



Pericardium, 20, 401, 434, 520 



Perichondrium, 55 



Perilymph, 189 



Perinaeum, 486, 540 



Periosteum, 55 



Periostracum, 399 



Perisarc, 312 



Peristaltic movements, 75 



Peris tome, 271 



Peristomium, 327, 351 



Peritoneum, 22, 26, 330, 434, 506 



Pes, 5, 51, 484, 505 



Peyer's patches, 515 



Phalanges, 50, 51, 502, 505 



Pharynx, 17, 335, 445, 448, 597 



Photosynthesis, 248 



Phylogeny, 224 



Phylum, 219 



Physiology, I, 217 



Pia mater, 155 



Pigment cells, 128 



Pigment -layer of retina, 185 



Pigment-spot, 254, 424 



Pineal body, 159, 459, 530 



Pineal eye, 159, 591 



Pinna, 483, 486 



Pisces, 219 ; general characters 



of, 418 



Pisiform bone, 502 

 Pituitary body, 159, 459, 53 

 Placenta, 483, 541, 610 

 Placoid scales, 434 

 Planula, 321 

 Plasma, 104 

 Plastic products, 249 

 Platyhelminthes, 412, 545 

 Pleopod, 364 

 Pleura, pleural membrane, 506, 



Pleurobranch, 375 



Pleuron, Crayfish, 361 



Podobranch, 375 



Podomere, 363 



Polar cells, 570 



Pollex, 502 



Polychaeta, 350 



Polymorphic, polymorphism, 318 



Polype, 294, 309 



Polyplast, 200, 577 ; and see 



under various types 

 Polystomum, 33 

 Pons Varolii, 530 

 Pores, dorsal, 333 

 Portal system : hepatic, 85, 456, 



527 ; renal, 85, 454 

 Post-axial and pre-axial borders 



of limb, 501, 503 

 Poupart's ligament, 506 

 Premolars, 509 

 Prepuce, 487 

 Preservative fluids, 13 

 Primitive streak and groove, 



581, 5.83 



Prismatic layer, 399 

 Proamnion, 583, 606 

 Proboscis, 353 



Processes of skull, 489 et seq. 

 Procoelous, 36 



Proctodaeum, 204, 384, 447, 597 

 Pronation, 501 

 Pronephric duct, 60 1 

 Pronephros, 60 1 

 Pronucleus, male and female, 



570. 572 



Prosencephalon, 460, 590 

 Prostate, see Gland 

 Prostomium, 327, 351 

 Proteids, 72 

 Protista, 258 



Protococcus, see SPHJERELLA 

 Protoplasm, 106, 558 ; and see 



Cell 



Protopodite, 364 

 Proto vertebra, 588 

 Protozoa, 220, 292 

 Proximal, 6 

 Pseudobranch, 449 

 Pseudopod, 106, 231, 250, 303 

 Pterygiophores, 441 

 Ptyalin, 511 

 Pubis, 51, 503 

 Pulmonary artery and vein, see 



Arteries and Veins 

 Pulse, 86 

 Pupil, 5, 182, 353 

 Putrefaction, 256,257; and see 



Decomposition 



