IXDEX 



633 



Pepsin, peptone, 74 

 Pericardia! gland, 406 

 Pericardia! sinus, 376 

 Pericardium, 20, 401, 434, 520 

 Perichondrium, 55 

 Perilymph, 189 

 Perinaeum, 486, 540 

 Periosteum, 55 

 Periostracum, 399 

 Perisarc, 312 



Peristaltic movements, 75 

 Peristome, 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, 530 

 Placenta, 483, 541, 610 

 Placoid scales, 434 

 Planula, 321 

 Plasma. 104 

 Plastic products, 249 

 Platyhelminthes, 412, -54-5 

 Pleopod, 364 

 Pleura, pleura! membrane, 506, 



Pleurobraneh, 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 Yarolii, 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, 583 



Prismatic layer, 399 

 Proamnion, 583, 606 

 Proboscis, 353 



Processes of skull, 489 et seq. 

 Precocious, 36 



Proctodaeum, 204, 384, 447, '597 

 Pronation, 501 

 Pronephric duct, 601 

 Pronephros, 60 1 

 Pronucleus, male and female, 



570. 572 



Prosencephalon, 460, 590 

 Prostate, see Gland 

 Prostomium, 327, 351 

 Proteids, 72 

 Protista, 258 



Protococcus, see SPH^RELLA 

 Protoplasm, 106, 558 ; and see 



Cell 



Protopodite, 364 

 Protovertebra, 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 



