702 



INDEX 



Pareiasaurus serridens, 480 

 Paso Robles formation, 604 

 Patagonian beds, 590 

 Patrician ice sheet, 613 

 Patriofelis, 570 

 Peale, A. C., cited, 504 

 Pecopteris unita, 460 

 Pecten choctawensis, 574 



complexicosta, 531 



humboldtensis, 500 



madisonius, 595 



texanus, 530 

 Pedinopsis pondi, 554 

 Pegmatite, 260 



Pelagic deposits, 189, 197, 198 

 Pelecypods, 500, 512 



Cambrian, 361 



Cretaceous, 554 



Devonian, 418 



Jurassic, 509, 510 



Miocene, 595 



Mississippian, 432 



Ordovician, 380, 381 



Permian, 480, 481 



Silurian, 397 

 Pelee, 238 

 Pelycosaurus, 477 

 Peneplain, 66, 67, 72 

 Penokee-Gogebic iron ore, 332, 333 

 Penrose, R. A. F., cited, 44, 583 

 Pennsylvanian fauna, 464 



flora, 458 



Pennsylvanian, foreign, 457 

 Pennsylvanian insects, 467 

 Pennsylvanian in West, 445 

 Pennsylvanian iron ore, 454 



land life, 466 



marine fauna, 469 



oil and gas, 454 

 Pennsylvanian period, 441-469 



close of, 456 



duration of, 455 

 Pennsylvanian sea life, 468 



system, 442 



thickness, 447 

 Pentacrinus briareus, 511 

 Pentamerus oblongus, 396 

 Pentremites robustus, 436 

 Perched bowlders, 163 

 Peridot, 255 

 Peridotites, 260, 262 

 Periodic movements, 219, 220 

 Perisphinctes tiziani, 508 

 Perissodactyls, 568 

 Peristerite, 254 



Perlites, 263 

 Permanent streams, 58 



origin of, 6 1 

 Permian amphibians, 477 



aridity, 470 



climate, 476 



fossils, 481 



glacial formations, 474 



life, 475 

 Permian period, 470-483 



plants, 476 



problems, 482 



reptiles, 477 



Permian, thickness of, 471 

 Pernopecten cooperensis, 433 

 Petrified trees, 589 

 Petrified wood, 35, 287 

 Phacoides foremani, 595 

 Phacops logani, 414 



rana, 419 



Phanerites, 248, 259, 262 

 Phenacodus primaevus, 567 

 Phillipsia major, 469 

 Phinney, A. J., cited, 374 

 Phobos, 301 

 Phosphates, Devonian, 411 



Ordovician, 374 

 Phosphatic nodules, 197 

 Phragmoceras nestor, 397 

 Phylloceras knoxvillensis, 531 

 Phyllograptus (?) cambrensis, 362 



ilicifolius, 385 



typus, 385 



Phyllotheca indica, 478 

 Piedmont alluvial plain, no 

 Piedmont glaciers, 129 

 Pilot Rock, 616 

 Pinnipeds, 571 

 Piracy, 65, 97, 98 

 Pitchstone, 258, 263 

 Pithecanthropus erectus, 610, 6n 

 Plagioclase, 254 



Planetesimal hypothesis, 300, 303, 310 

 Planets, 2 



Plants, classification of, 685 

 Platacarpus coryphaeus, 550 

 Plateau-forming movements, 220 

 Platephemera antiqua, 424 

 Platyceras dumosum, 416 



gibbosum, 414 



primaevum, 361 

 Platyostoma niagarensis, 397 



broadheadi, 433 

 Platystrophia lynx, 382 

 Plectambonites sericeus, 382 



