432 



INDEX. 



Ossification, 14. 

 Ossification, perichondral, 



133- 



Ostariophysi, 254. 

 Osteoblasts, 15, 133. 

 Osteolepis, 250., 

 Osteostraci, 225. 

 Ostium tubae. 127. 

 Ostracion, 267. 

 Ostracodermi, 224, 266. 

 Ostrich, 345. 

 Otaria, 413. 

 Otariidae, 413. 

 Otic capsule, 151. 

 Otic ganglion, 62. 

 Otic vesicle, 70. 

 Otis, 349. 

 Otocoelus, 310. 

 Otocyon, 412. 

 Otoliths, 71. 

 Otter, 412. 

 Oudenodon, 305. 

 Ova, 125. 



Ovarian artery, 191. 

 Ovaries, 125. 

 Ovibos, 400. 

 Oviduct, 127, 247. 

 Ovis.400. 



Ovum, history of, 205. 

 Owls, 348. 

 Oxyclaenidas, 411. 



Paca, 391. 

 Pachycormus, 252. 

 Pachylemuridae, 415. 

 Pacini's corpuscles, 69. 

 Paddlefish, 251. 

 Palaeobatrachidae, 287. 

 Palaeeudyptes, 347. 

 Palasonictidas, 411. 

 Palaeonictis, 411. 

 Palaeohatteria, 314. 

 Palaeoniscidae, 251. 

 Palaeoniscus, 251. 

 Palseorhynchidae, 263. 

 Palseotherium, 395. 

 Paloeosyops, 396. 

 Palate, 358. 

 Palatine bone, 163. 

 Palatine nerve, 62. 

 Palatoquadrate, 156. 

 Palinurichthys, 263. 

 Pallium, 51. 

 Palorchestes, 380. 



Pancreas, 41. 

 Pangolin, 382. 

 Panniculus adiposus, 354. 

 Panniculus carnosus, 115. 

 Panther, 412. 

 Pantolambda, 400. 

 Pantolestidae, 396. 

 Parabronchi, 31. 

 Parachordals, 151. 

 Paracone, 365. 

 Paraconid, 365. 

 Paradidymis, 130. 

 Paradisea, 350. 

 Paralichthys, 265. 

 Paraphysis, 87. 

 Parapinealis, 86. 

 Parapophysis, 141. 

 Parasuchia, 328. 

 Parasphenoid, 163. 

 Pareiasauria, 304. 

 Pareiasaurus, 304. 

 Parietal bone, 161. 

 Parietal eye, 85. 

 Paroccipital, 161. 

 Parocthus, 383. 

 Parovarium, 129. 

 Parrot fish, 260. 

 Parrots, 349. 

 Partridge, 350. 

 Passer, 351. 

 Passeres, 351. 

 Patella, 360. 

 Patheticus nerve, 59. 

 Patriofelis, 411. 

 Paunch, 35. 



Pavement epithelium, 9. 

 Pavo, 350. 

 Peafowl, 350. 

 Peccaries, 397. 

 Pecora, 396. 

 Pecten, 340. 

 Pecten of eye, 296. 

 Pectineal process, 336. 

 Pectoral fins, 231. 

 Pectoral girdle, 168. 

 Pectoral limb, 167. 

 Pedetes, 390. 

 Pediculati, 266. 

 Peduncles of brain, 54. 

 Pegasus, 260. 

 Pelecanus, 347. 

 Pelican, 347. 

 Pelobates, 286. 

 Pelobatidae, 286. 



Pelomedusa, 311. 

 Peltephilus, 384. 

 Pelvic girdle, 168. 

 Pelvic limb, 167. 

 Pelvis renalis, 123. 

 Pelycodus, 415. 

 Pelycosauria, 306. 

 Penguin, 347. 

 Perameles, 380. 

 Peramelidae, 379. 

 Perca, 259. 

 Percesoces, 262. 

 Perch, 259. 

 Perch, surf, 260. 

 Percidae, 259. 

 Percoidea, 259. 

 Percopsis, 259. 

 Perdix, 350. 



Perennibranchiata, 284. 

 Pericardio-peritoneal canals, 



106. 



Pericardium, 106, 179. 

 Perichondral ossification, 



133- 



Perichondrium, 15. 

 Perilymph, 72. 

 Perimysium, 12, 112. 

 Perineum, 130. 

 Periosteum, 15. 

 Peritoneal cavity, 106. 

 Peritoneal layer, 39. 

 Peritoneum, 103. 

 Periptychidse, 393. 

 Permanent dentition, 20. 

 Peropoda, 325. 

 Peroneal artery, 191. 

 Petalopteryx, 259. 

 Petaurus, 380. 

 Petrel, 349. 

 Petromyzon, 223. 

 Petromyzontes, 223. 

 Petrosal, 166, 356. 

 Phacochcerus, 397. 

 Phaethon, 347. 

 Phalacrocorax, 347. 

 Phalanges, 176. 

 Phalangista, 380. 

 Phalangistidae, 380. 

 Phanerobranchia, 284. 

 Phaneropleuron, 273. 

 Pharyngeal bones, 244. 

 Pharyngobranchial, 154. 

 Pharyngognathi, 260. 

 Phascalonus, 380. 



