INDEX 



5°* 



Palaeoniscoidea, 428 

 Palaeoniscoid scale, 259 

 Palceospondylus , 427 

 Palatine, 71, 73, 300 



— nerve, 46 

 Pancreas, 30, 53, 402 

 — , devpt. of, 185 

 Pangolin, scales of, 257 

 Panniculus carnosus, 133, 258, 278 

 Parachordal, 194, 279 

 Parapineal eye, 25 

 Parapithecus , 462 



Parapsida, 292, 440 

 Parasitic males, 430 

 Parasphenoid, 68, 72, 297, 300 

 Parasympathetic, 47, 385 

 Parathyroid, 101, 402 

 Parietal, 68, 72, 292, 300 

 Paroccipital process, 104 

 Paroophoron, 149 

 Parotid gland, 145 

 Patella, 124, 142, 301 

 Paunch, 346 

 Pecten, 131 

 Pelvic bone, 72 



— nerve, 386 

 Penguin, 450 

 Penna, 117 



Pentadactyl limb, 89, 314 

 Perameles, 456 



— , placenta of, 248, 251 



Periblast, 200 



Pericardio-peritoneal canal, 53, 271 



Pericardium, 30, 31, 53, 271 



— , devpt. of, 185 



Perichordal centra, 303 



Perilymph, 113 



Periesophageal ciliated band, 10, 28 



Periophthalmus, 430 



Periotic, 120, 300 



Perissodactyla, 457 



Peristomial mesoderm, 165, 179, 204 



Peritoneum, 2 



Petaurus, 456 



Petromyzon, head of, 355, 358 



— , horny teeth of, 257 



Peyer's patches, 136, 336 



Phalanges, 93, 301 



Phalarope, 449 



Pharyngobranchial, 48, 69, 73, 400 



Phascolarctos , 456 



Phascolomys, 456 



Phoronis, 423 



Phrenic nerve, 157 



Pia mater, 41, 43, 155 



" Pigeon's milk," 353 



Pigment-cells, 260 



Pigment-layer of eye, 22, 40, 190 

 Pila antotica, 279 

 Pineal eye, 24, 25, 41 



— foramen, 284, 285 



— gland, 402 

 Pinna of ear, 134 

 Pinnipedia, 457 

 Pipa, breeding of, 352 

 Pisiform, 142 

 Pithecanthropus, 464 



Pituitary body, 25, 41, 61, 193, 399 



Placenta, 231, 248, 425 



Placentalia, 456 



Placodes, 193 



Plantigrade, 319 



Plasmodi-trophoblast, 231 



Plastron, 258 



Platybasic skull, 281 



Platyrrhinag, 461 



Platysma muscles, 134, 258, 278 



Platytrabic skull, 281 



Plesiadapis, 460 



Plesiosaurus, 258, 292, 440 



Pleura, 143 



Pie ur acanthus, 312 



Pleural cavity (of birds), 125, 274 



(of mammals), 143 



— ribs, 83, 307 

 Pleurocentrum, 301, 304 

 Pleurodont dentition, 261 

 Pliohippus, 457 

 Pliopithecus , 462 

 Pliotrema, 338, 479 

 Plumuke, 119 

 Poebrotherium, 458 

 Poikilothermous, 404 

 Poison-fangs, 263 



Polar bodies, 161, 172, 198, 227 

 Polyphyodont dentition, 138, 265 

 Polypterus, 428 

 — , kidney of, 350 

 — , lungs of, 330, 339 

 — , pituitary of, 401 

 — , ribs of, 307 

 — , scales of, 259 

 -> — , spiracle of, 338 

 Polyzoa, 423 

 Pons Varolii, 153, 376 

 Portal vein, 4, 335 

 Postcleithrum, 71, 73, 301 

 Posterior cardinal vein, 31, 58, 97; 

 111,148,329 



— cervical ganglion, 156, 385 



— chamber of eye, 23 



— commissure, 41, 155 



— intestinal portal, 21 1, 230 

 Postganglionic fibre, 384 



