IXDEX. 



635 



PAGE 



Ornithotarsus 485 



Orodus mainmilare 399 



Orohippus 541 



Orthis Davidsonii 315 



Hicksii 300 



Livia 332 



porcata 315 



Orthisina transversa 299 



Orthoceras Duseri 319 



tnedullare 319 



multicameratum 319 



restoration 318 



vertebrale 319 



Orthoclase 203 



Orthoceratite 31T 



Orthonema Newberryi 333 



Orthonota parallela 316 



Orton 387 



Osborn 450, 457 



Osmeroides Mantelli 484 



Osteolepis 337 



Ostrea Caroliniensis 514 



Georgiana 512 



Idriaensis 478 



Marshii 430 



sellaef ormis 512 



Sowerbyi 430 



■ ■ Titan 513 



Otodus 483 



Otozamites Macombii 459 



Otozoum Moodii 454 



Oudenodon Bainii 420 



Outcrop 177 



Owen 419, 421 



Oxford clay 424 



Oyster, first appearance 428 



P 



Pachyderms 539 



Pachypteris lanceolata 427 



Pachytherium 587 



Palseaster Sheefferi 313 



Palseocarus typus 396 



Palaeolithic age 607 



Palaeoniscus aculeatus 396 



restoration 412 



Palaeophonus 511 



Palaeopteris, leaf-scars 365 



Palaeopternus 326 



Palaeosyops 532 



Palseotherium magnum 523 



Palaeozoic era 282, 289 



era, chemical changes during 405 



era, general observations 405 



era, physical changes during 405 



era, physical geography on American 



Continent 292 



era, subdivisions 293 



fauna compared with Neozoic 407 



rocks, area in the United States 291 



rocks, thickness 290 



times, general picture 407 



transition from, to Mesozoic 409 



PAGE 



Paradoxides Bohemicus 301, 324 



Harlani 301, 324 



Paris, Eocene basin 523 



Peat, alternation with sediments 143 



bogs and swamps ko 



composition and properties 141 



mode of growth 141, 142 



Pecopteris f alcatus 458 



Strongii 363, 3G4 



Pecten cerrocensis 513 



fibrosus 430 



nuperum 512 



Valoniensis 417 



Pele's Hair 91 



Pemphyx Sueurii 417 



Peneroplis planatus 162, 472 



Pentacrinus Caput-Medusae. 310 



Pentamerus Knightii 315 



Pentremitcs Burlingtoniensis 392 



cervinus 392 



gracilis 392 



pyrif ormis 392 



Perigord caves 612 



Periptychus rhabdodon 530 



Perissodactyls 539 



Permian period 409 



reptiles, affinities 413 



rocks, area in United States 413 



shells 411 



Perry Ill 



Petalodus destructor 399 



Petrifaction 191 



theory of 192 



Petroleum, geological relations 386 



kinds of rocks which bear 388 



laws of interior distribution 387 



origin, theories of 389 



origin of varieties 390 



Phacops latif rons 334 



Phascolotherium 448 



Phenacodus prirnaevus 530 



Phillips, A 246,247. 248, 249 



, J 73, 232, 273, 347 



Phillipsia Lodiensis 396 



Phonolite 208 



Phryganea cases 516 



Phyllocladus 359 



Phyllograptus typus 308 



Phyllopods 325 



Physical geography of America and Europe 



compared 345 



Pine-cone. Jurassic 427 



Placer-mines 240, 601 



Placoderms 339 



Placo-ganoids 339 



Placoids, Carboniferous 399 



Cretaceous 482 



Devonian 335, 337 



distribution in time 484 



Jurassic 436 



Tertiary 513, 514 



Plagioclase 2°4 



Plagiaulax 448 



Plants, Carboniferous 358 



