INDEX. 



597 



Pauropus, 184. 



Pearly Nautilus, 274, 277, 278. 



Peccary, 430 



Pecopteris, 475, 482, 486, 495, 497, 498, 533. 



Pecten, 221, 222. 



Pectinaria, 137. 



Pectinated rhombs of Cystideans, 132. 



Pectunculus, 226, 227. 



Pedicellariae, H4. 



Pedicellinece, 194. 



Pedipalpi, 182. 



Pedunculated Cirripedes, 150, 152. 



Peltoearig, 159, 160. 



Pen, of Cuttle-fishes, 294. 



Penarth beds, 531. 



Pennatulidce, 101. 



Pentacrinus, 123, 124, 127, 128. 



Pentatnerus, 207, 208. 



Pentremites. 133, 134. 



Percidce, 318. 



Perdicidte, 394. 



PerennibrancMata (Amphibia), 346. 



Perforata, 96 ; distribution of, in time, 97. 



Peridinium, 59. 



Periechocrirms, 126. 



Perischoechmidce, 108, 110. 



Perispongia, 537. 



Perissodactyla, 423, 424. 



Permian period, rocks of, 52S ; life of, 



529 ; flora of, 495. 

 Perna, 223, 224. 

 Petalodus, 339. 

 Petraia, 89. 

 Petraster, 114, 115. 

 Petrodiifi, 339. 

 Petrospongiadce, 69. 

 Pezophaps, 391. 

 Phacopidce, 167, 170. 

 Phacops, 162, 167, 170. 

 Phalangidce, 182. 

 Phalangistidce, 408, 413. 

 Phanerogams, 473. 

 Phaneropleurini, 327, 329. ' 

 Phaneropleuron, 327, 329. 

 Pharyngobranchii, 314. 

 Phascolomys, 408. 

 Phascolotheriurn, 405, 410. 

 Phasianidce, 394. 

 Phillipsastrcea, 95. 

 Phillipsia, 167, 171. 

 Phlebopteris, 498. 

 Phocidce, 449, 450. 

 Pholadidce, 218, 239. 

 Pholadomya, 239. 

 PAoZas, 240. 

 Pholidogaster, 352. 

 Pholidophorus, 324. 

 Phorus, 254. 

 Phragmacone, of Spirilla, 296; of Belem- 



nite, 297. 



Phragmoceras, 283, 285. 

 Phylactolcemata, 194. 

 Phyllograpsus, 85. 

 Phyllopoda, characters of, 159 ; distribu- 



tion of, in time, 159. 

 Phyllostomidce, 461. 

 Phyllostoma, 462. 



Physeter, 420. 

 Physophoridce, 73, 74, 84. 

 Physostomata, 315. 

 Phytopsis, 479. 



Pileolus, 255. ' 



Pileopsis, 259. 



Pinites, 493. 



Pinna, 223, 224. 



Pinnigrada, 448. 



Pinnipedia, 447, 448. 



Pinnularia, 477, 478, 482, 483. 



Pisania, 247. 



Pisces, characters of, 306; orders of, 315; 



distribution of, in time, 313. 

 Pisidium, 234. 

 Pistosaurus, 372. 

 Placodus, 326, 372. 

 Placoganoids, 322. 

 Placoidei, 307. 

 Placoid scales, 307. 

 Placunopsis, 221 

 Plagiaulax, 406, 411. 

 Plagiostoma, 222. 

 Plagiostomi, 335, 336. 

 Planorbis, 242, 268. 

 Plantigrada, 448. 

 Platanus, 500, 502. 

 Ptatoa;, 318, 319. 

 Platephemera, 185. 

 Platyceras, 258, 259. 

 Platycrinus, 120, 123, 126. 

 Platygnathus, 326. 

 Platyrhina, 465. 

 Platysomidce, 325. 

 Platysomus, 325, 530. 

 Platystoma, 53-t. 

 Pleetognathi, 318, 321. 

 Plectrodus, 338. 

 Plesiosauria, 370. 

 Plesiosuurus, 371, 372. 

 Plesiosorex, 463. 

 Pleuracanthus, 335, 338, 342. 

 Pleuraster, 115. 

 Pleurobranchidce, 261. 

 Pleurocysiites, 130. 

 Pleurodictyum, 97. 

 Pleurodont Lizards, 362. 

 Pleuronectidce, 317, 318. 

 Pleurotoma, 249. 

 Pleurotomaria, 257, 264. 

 Plicatula, 222, 223. 

 Pliocene period, rocks of, 554 ; life of, 557. 



flora of, 503. 

 Pliopithecus, 466. 

 Pliosaurus, 372. 

 Plmnaster, 111. 

 Podocarya, 499. 

 Podophthalmata, 176, 177. 

 Podozamites, 476, 497, 533. 

 Poikilopleuron, 377. 

 Pollicipes, 154. 

 Polycoe.Ha, 100, 529. 

 Polycystina, 66, 67. 

 Polypodites, 498. 

 Polypothecia, 543. 

 Polypterini, 326. 

 Polypterus, 321, 322, 326, 327. 

 Polytrema, 64. 

 Polyzoa, characters of, 190 ; orders of, 



194 ; distribution of, in time, 195. 

 Polyzoarium, 190. 

 Populus, 500. 

 Porambonit.es, 208. 

 P&rcellana, 180. 

 Porcellia, 245. 263. 265. 

 Porites, 96. 



