484 



INDEX. 



Parazoa, 433 



Parietals, 80 



Parieto-f rentals, 161 



Parthenogenesis, 363 



Patella, 77 



Pectoral girdle, 72, 148, 183 



Pedipalpi, 442 



Peduncles of cerebellum, 104 



Pelecypoda, 334 



Pelvic girdle, 75, 149, 183 



Pelvis of kidney, 63 



Penis, 125 



Pepsin, 16 



Peptone, 16 



Pericardio-peritoneal pores, 173, 242 



Pericardium, 6, 59, 134, 139, 173, 



241, 326 



Perichondrium, 21, 63 

 Perilymph, 114 

 Perimysium, 86 

 Periosteum, 54 

 Periotic, 80, 167 

 Peripheral nervous system, 89 

 Perisarc, 389 

 Peristaltic action, 19, 87 

 Peristomium, 352 

 Peritoneum, 6, 69 

 Perradial, 392 

 Peyer's patches, 19, 68 

 Phagocytes, 245 

 Phalanges, 74, 77, 149, 150 

 Phalangida, 443 

 Pharyngo-branchial, 181 

 Pharynx, 15, 174, 195, 236, 339, 352 

 Phylum, 208 

 Physiology, 10, 11 

 Pincers, 304 

 Pineal, 33, 103, 152 

 Pinna of ear, 114, 130 

 Pisces, 448 



Pituitary, 33, 103, 152, 185, 267 

 Placenta, 133, 265 

 Placoid scales, 170 

 Plant and animal, 10, 40, 381 

 Planula, 395 

 Plasma, 20 

 Plastic products, 45 

 Platyhelmia, 435 

 Pleura, 6, 37, 69 

 Pleurobranchs, 315 

 Pleuron, 303 



Plexus, Brachial, 100, 150 

 , Lumbo-sacral, 100 



Plexus, Sciatic, 160 



,, , Solar, 99, 154 

 Podobranchs, 314 

 Polar bodies, 213, 228, 247, 262, 384 



,, cells, 214 

 Poles of ovum, 221 

 Polychaeta, 31!), 440 

 Polycladida, 436 

 Polymorphism, 398 

 Polystomum, 437 

 Pons Varolii, 103, 152 

 Portal system, 23, 134, 208 

 Postaxial surface, 72 

 PrsB-oral hood, 193 

 Preaxial surface, 72 

 Pre-coracoid, 148 

 Premaxilla, 80, 161 

 Premolars, 14, 80, 81 

 Prephyloric, 310 

 Pre-sphenoid, 80, 166 

 Pressure-sense, 171 

 Primitive characters, 282 



,, hypoblast, 223, 250 



,, streak, 251, 264 

 Procoalous, 147 



Proctodaeum, 226, 236, 269, 309, 345 

 Proglottides, 366, 438 

 Pronephros, 237, 278 

 Prone position, 73 

 Pronuclei, 213, 228, 384 

 Pro-otic, 161 

 Propodite, 304 

 Pro-pterygium, 183 

 Prosencephalon, 101 

 Prostomium, 352 

 Proteids, 12, 42 

 Protoplasm, 38, 42, 212, 400 

 Protopodite, 304 

 Prototheria, 454 

 Protovertebrae, 235, 253 

 Protozoa, 45, 322, 403, 429 

 Pseudo-navicellae, 414 

 Pseudopodia, 38 

 Pterocardiac, 310 

 Pterygoid, 81, 162 

 Ptyalin, 14 

 Pubis, 76, 149 

 Pulse, 22 

 Pupil, 116 



Pylangium, 143, 17G 

 Pyloric, 310 

 Pyramid, 63 

 Pyrenoids, 408 



