792 



INDEX. 



Ostrea Vicksburgensis, 518* 



Virginica, 521. 



Vomer, 516. 

 Otodus, 477. § 



appendiculatus, 477.* 

 Otozoum Moodii, 425, 427.* 

 Ottawa basin, remarks on, 223, 

 228, 386. 



River in existence, 300. 

 Ottrelite, 77.$ 

 Ourang, 422,$ 584. 

 Outcrop, 105.$ 

 Ovis, 529. 



Ovula, first of, 484. 

 Owen, R. ( of London), on Dro- 

 matlierium, 429. 



on Herbivores, 422.$ 



on Stereognathus, 462. 

 Owen, R. (of U. S.), on tbe po- 

 sitions of the outlines of 

 continents, 39. 

 Ox family, range of, in time, 



572. 

 Oxford clay, 448. 

 Oxfordian group, 449. 

 Oxyrhina, 477. 



hastalis, 521. 

 Oyster, crab found in, 375. 



Pachyderms, range of, in time, 



572. 

 Pachynolopus, 529.$ 

 Pachytherium, 423,$ 566, 

 Pacific, observations on, 11. 



active volcanoes in, 686. 



system of currents in, 42. 



change of level in, indi- 

 cated by coral islands, 

 587. 

 Pacific island-chains, 30,* 33. 



islands, elevations among, 

 587. 



islands, erosion in, 637. 

 Palaeaster matutina, 212* 



Niagarensis, 148,* 240. 

 Palsemon, 358. 



Palaeechinus multipora, 313 * 

 Palasocrinus striatus, 209* 

 Palseocyon, 529.$ 

 Palaeocyclus rotuloides, 236.* 

 Palseocystites tenuiradiatus, 



191. 

 Palaeolagus, U. Missouri, 521. 

 Palasoniscus, 350. 



Freieslebeni, 375.* 



lepidurus, 279* 

 Palseophis typhseus, 526. 

 Palseophycus irregularis, 178. 



tubularis, 179. 

 Palseosaur, 346.g 

 Pal£eosaurusCarolinensis,428.* 

 Palasothere, 423,? 526, 527.$ 

 Palreotherium magnum, 527 * 

 Palaeozoic time, 167. 



general facts of, 377. 



transition from, to Mesc- 

 zoic, 413. 



Geography of, 386. 



forces the same as Azoic, 

 393. 



mountains of, 387. 



rivers of, 388. 



rocks, distribution of, 389. 



Palaeozoic rocks, proportion 

 of, to other rocks, 413. 



rocks, thickness of, 377. 



section of the Mississippi 

 basin, 378. 



section at Bore Springs, 

 Va., 404. 



section at Pottsville, Pa., 

 404. 

 Palapteryx, 580. 

 Palasterina Jamesii, 221.* 

 Palephemera mediseva, 426.* 

 Palinurus, shell of, 67. 

 Pallial impression, 157.$ 

 Palliobranchs, 179-§ 

 Paloplotherium, 529.$ 

 Palpipes priscus, 461.* 

 Palm, Tertiary, 513. 

 Palms, first of, 471. 



Tertiary, of England, 

 524. 

 Paludina, first of, 453. 



carinifera, 465. 



Fluviorum, 464* 

 Panopasa oblongata, 518. 

 Parabatrachus Colei, 358. 

 Paradoxides asaphoides, 189. 



Bennetii, 189. 



Harlani, 184, 189 * 



Thompsoni, 189. 



Vermontana, 189. 

 Paris basin, Tertiary of, 522. 

 Parisian system, 523. 

 Parma sandstone, 381. 

 Parophite, 61, 82.$ 

 Pearlstone, 88.$ 

 Peat, 68,$ 549, 613.$ 

 Pecopteridse, 338.$ 

 Pecopteris, 338,$ 355. 



arborescens, 338* 342. 



Cyathea, 338, 342. 



nervosa, 342. 



plumosa, 342. 



polymorpha, 342. 



Sillimani, 342. 



Stuttgartiensis, 420.* 



unita, 338. 



velutina, 342. 



range of, in time, 494. 

 Pecten, 399. 



asquivalvis, 464. 



aviculatus, 349. 



circulans, 487. 



concentricus, 521. 



decennarins, 521. 



Islandicus, 552. 



Lens, 464. 



Lyelli, 516. 



Mortoni, 522* 



Poulsoni, 518* 



5-costatus, 479. 



vagans, 464. 



Virginianus, 521. 

 Pegmatite, 76.§ 

 Pelagosaurus, 457.$ 

 Peltura holopyga, 189. 

 Pemphix Sueurii, 436,* 438. 

 Pennsylvania coal-field, map 

 of, 323. 



faults in, 408. 



map of axes of flexures 

 in, 406. 



mineral oil in, 756. 



Pennsylvania, section of rocks 

 of, 379. 



Calciferous in, 176. 



Carboniferous in, 322, 

 326. 353. 



Catskill in, 292. 



Cauda-Galli grit in, 269. 



Chemung in, 288. 



Clinton in, 234. 



Hamilton in. 282. 



Hudson in. 218. 



L. Helderberg in, 252. 



Medina in, 231. 



Millstone grit in, 322. 



Niagara in, 238. 



Oneida in, 230. 



Oriskany in, 266. 



Potsdam in, 175. 



Subcarboniferous in, 307, 

 308. 



Trenton in, 207. 



Triassic in. 416. 



Upper Helderberg in, 270. 



TJtica shale in, 218. 

 Pentacrinus Asteriscus, 446.* 



Briareus, 453, 464. 



Caput-Medusas, 161* 



Ytilgaris, 464. 

 Pentamerus, 183.§ 



aratus, 274. 



brevirostris, 261. 



Conchidium, 242, 262. 



elongatus. 274. 



galeatus, 252, 254,* 255, 

 262, 264. 



interplicatus, 240,* 261. 



Knightii. 264* 



oblongus, 235, 237,* 240. 

 242. 



occidentalis, 249. 



pseudo-galeatus,252, 254,* 

 255. 

 Pentamerus limestones, 252. 

 Pentremites, 162,$ 296, 310. 



florealis, 312. 



Godonii. 312* 



pyriformiS; 312.* 

 Peperino. 74.$ 

 Perameles. 424.$ 

 Perch, 278.$ 



Periods and Epochs. 130.$ 

 Perissodactyls. 423.$ 

 Permian period. 369. 

 Permian and Carboniferous 

 conformable. 412. 



and Carboniferous uncon- 

 formable. 412. 



in analogous situations 

 in America and Russia. 

 373. 

 Perrey, A., on earthquakes, as 

 evidence of interaal 

 waves, 684, 730. 

 Perthes, B. de. on human 



relics, 581. 

 Petherwiu group, 294. 

 Petraia, 392. 



Corniculum. 211.* 

 Petroleum, 756.$ 

 Petrosilex. 76,$ 80.$ 

 Phacops Bufo, 286 * 



limulurus, 261. 

 Phaanoganis, 166.$ 



