INDEX. 



899 



Pebbles in alluvium. 655. 

 Peccarv,503, 511,565, 568. 

 Pecopteris, 330, 348, 349, 370, 

 433. 



approximate, 449. 



arborescens, 327* 330, 331, 

 357. 



bullata, 407*409. 



cyathea, 330, 331. 



diversa, 449. 



nervosa. 331. 



plumosa, 331. 



polymorpha, 331. 



preciosa. 271. 



Sillimani. 331. 



unita, 330. 



velutina, 331. 

 Ptcfem, 428, 433, 475, 495, 508. 



aequivalvis, 448. 



asper, 476. 



circularis, 476. 



concentricus, 510. 



decennarius, 510. 



Grcenlandicus, 553. 



irradians. 561- 



Islandicus, 553, 559. 



Jacobseus, 577. 



lens, 449. 



Liasinus, 429. 



Lyelli, 509. 



maximus, 577. 



Mortoni, 500,*511. 



Poulsoni, 499 * 509. 



propatulus, 510. 



5-costatus, 468, 476. 



vagans, 449. 



Virginianus, 510. 



Valonieusis, 429. 

 Pectinated rhombs, 129. § 

 Pectunculus, 483. 



glycimeris, 577. 



variabilis, 519. 

 Peculiarities of life continuous, 



599. 

 Pegmatvte, 72. § 

 Pe4«5 : s hair, 743.§ 

 Pelican. 516. 

 Peltura holopyga, 178. 

 Pemphigaspis, 178. 

 Pemphix Sueurii, 428* 429. 

 Pennant, 347 

 Pennine fault, 399. 



range, 346 

 Pennsylvania, Arcbaean in, 150. 



Black River in, 184. 



Calciferoue in, 184. 



Carboniferous in, 291, 309, 

 320, 321, 356. 3-58, 653. 



Catskillin, 280. 



Cauda-galli grit in, 256. 



Chazy in, 182, 184, 185. 



Chemung in, 276. 



Cincinnati in, 197. 



Clinton in, 220. 



coal-field, map of, 310.* 



faults in, 399. 



Hamilton in, 267. 



Lower Ilelderberg in, 237. 



Lower Silurian in, 210. 



map of axes of flexures in, 

 397* 



Medina in, 218 



Millstone grit in, 320. 



mineral oil in, 268. 



Niagara in, 220. 



Oneida in, 218. 



Potsdam in, 168, 181. 



Quaternary in, 528. 



section of rocks of, 375. 



Pennsylvania, Subcarbonifer- 

 ousin, 293,295, 297. 



Trenton in, 194. 



Triassic in, 404, 405, 419. 



Upper Ilelderberg in, 256. 



Utica in, 196. 

 Pentacrinus, 432, 437. 



asteriscus, 432* 433. 



basaltif ormis, 448. 



Briareus, 448. 



Caput-Medusae, 118* 



Fittoni,476. 

 Pentamerella arata, 261. 

 Pentamerus, 171 ,§ 228. 



Barrandei, 206. 



brevirostris, 248. 



conchidium, 230, 249. 



elongatus, 261. 



galeatus, 237, 239* 240, 247, 

 248. 



globosus, 247. 



group, 164. 



Knightii, 245, 246,* 247, 248. 



lens, 208 



levis, 248. 



oblongus, 206, 208, 224,* 228, 

 229, 230, 247, 248. 



pseudo-galeatus, 237, 239,* 

 240. 



range of, in time, 386.* 



reversus, 206. 



undatus, 208. 

 Pentamerus limestones, 164, 



237. 

 Pentremital group, 294. 

 Pentremites, 129,§ 190, 260, 

 284, 288, 297. 



florealis,298,*303. 



Godonii,298.*303. 



pyriformis, 298 * 302. 



range of, in time, 386.* 



Woodmani, 303 

 Peperino, 68,§ 

 Perch, 474, 475. 

 Percy, analysis of coal, 316. 

 Peridotyte,"72,§ 78,§ 727, 741. 

 Periods and Epochs, 138, 141. § 

 Perissodactvls, range of, in 



time, 589.* 

 Permian period, 291, 367. 

 Permian and Carboniferous 

 conformable, 402 



and Carboniferous uncon- 

 formable, 402. 



of America and Russia, 370. 

 Perna Mulleti, 475. 

 Perrey, A., on earthquakes, as 

 evidence of internal waves, 

 804. 

 Persea, 497. 

 Persia a plateau, 22. 

 Peru, Cretaceous in, 470. 



earthquake in, 675. 



Jurassic in, 433. 

 Petalodonts, 304, 336. 

 Petalodus, 304, 342. 



destructor, 836 * 343. 

 Petalorhynchus, 304. 

 Peters, analysis of coals, 316. 

 Petersen and Schodler, analyses 



of wood, 361. 

 Petherwin group, 282. 

 Petraia, 204. 



aperta, 202. 



bina, 247. 



corniculum, 199,* 202. 



gracilis. 206. 



profunda, 202. 



subduplicata, 207, 208. 



Petricola, 483 608. 

 Petrifactions, 47, § 615, 708. 

 Petrified turtles, 88.§ 

 Petrodus occiden talis, 336,* 



343 

 Petroleum, 197, 222, 256, 268. 

 Petrosilex, 73. § 



Phacops, 174,§ 204, 208, 228, 

 240, 243, 249, 253, 285. 



bufo, 261, 273* 274. 



caudatus, 247. 



Downingii, 250. 



limulurus, 248. 



Orestes, 206. 



rana, 274. 

 Phanerocrystalline, 64. § 

 Phanerostomum senarium, 466. 

 Pharella Dakotensis, 468. 

 Phascolotherium Bucklandi, 



447, 448,* 449. 

 Phen ogams, 133 § 

 Phillippine Islands, hot springs 



in, 612. 

 Phillips, J. A., 760, 781. 

 Phillips, J., on Jurassic Rep- 

 tiles, 444. 

 Philipsastrea Verneuili, 259,* 



261. 

 Phillipsia, 304, 308. 



Cliftonensis, 342. 



major, 342. 



Missouriensis, 342. 



pustulata, 308. 



range of, in time, 388.* 



scitula, 342. 



seminifera, 308.* 

 Phlogopite, 54.§ 

 Phoca, 520. § 



Wymani, 511. 

 Pholadomya ambigua, 448. 



cuneata, 518. 



fidicula, 449. 



gibbosa, 449 



occidentalis, 469. 



orbiculata, 432. 



papyracea, 468. 

 Pholas, 475, 608. 



crispata, 519, 553. 



lata, 519 

 Phonolyte, 77,§ 767. 

 Phosphatic beds, 495. 



nodules, 61, 67- 



rock-material, 59, 60, 613, 

 712. 

 Phosphatic impurity of ocean, 



593. 

 Phosphoric acid in ash of 



plants, 61 

 Phragmites CEningensis, 498. 

 Phragmocone, 432. § 

 Phragmoceras, 203 § 



immaturum, 203. 

 Phronima, 611. 

 Phyllograptus, 207. 



tvpus, 187* 190. 

 Phyllopods, 122,§ 227, 342, 592, 

 595 



range of. in time, 388.* 

 Phyllopteris, 348. 

 Physa, 508, 617, 



heterostropha, 341, 550. 

 Physeter, 520. § 

 Physiography, 2.§ 

 Physiographic Chart, 11, 41, 

 583. 



Geologv, 7,§ 9. 

 Phytolitharia, 632.* 

 Picryte, 79. § 

 Pictured rocks, 168, 181, 184 



