Index. 



617 



()phi(lernia llava, 212 



flavicephala, 212 



flaviguttula, 212 



salamandra, 212 

 Ophileta compacta, 555 

 Opisthoparia. 334 

 Oiiolida-, 459 



Ormenis pruinosa, 213, 234, 235 

 Orthiiliiim lainellosum, 512, 519, 521, 



530, 532, 533. 542. 551 

 Orthis acutiplata, 512, 527, 5^9, 547, 



563, 564 



costalis, 503, 505 



ignicula, 519, 527, 530, 566 



perveta, 506 



sp., 380, 501 

 Orthoceras, 173, 521, 533, 534, 535, 536, 

 542, 543, 544, 545. 546, 549, 550, 

 551. 55*5, 557 



allumettense, 55.S, 560, 561 



antenor, 510, 558 



bilineatum, 510, 554 



hisingeri, 557 



maro, 510 



minganensis, 510 



multicameiatum, 517 



natator, 510 



rectiannulatum, 513, 519, 522 



shumardi, 510 



titan, 504 



tenuiseptum, 519 

 Orthoceratites, 545 

 Ortliothetes, 82, 419 



arctistriatus, 83, loi, 155, 157, 176, 

 177 



bellulus, 83, 103, 106, 151, 167 



chemungensis, 83, 100, loi, 102, 

 107, 148, 151 



pectenacea, 103, 167, 176 



perversus, lOi 



flabellus, 107 



inflatus, 423 



minutus, 107 



pandora, loi 



subplainis, 107 

 Orthidre, 81 



f )rtliotylus, species nova ? 200 

 Ortniann, Dr. A. E., 4, 470 



Crawfishes of Western Pennsylvania, 

 3S7-406 



Procanibarus, a New Subgenus of 

 the (jenus Cambaru«, 435-442 

 Osborn, H. F., 183, 184 

 Os temporis, 465 

 Ostracoda, 8r, 174, 380, 557 

 Ostrea engelmanni, 426 

 Otiocenis coqueberti, 214 



degeeri, 214 



Otiocerus wolfi, 214 

 Oxalis cymosa, 47S 

 OxycarininK, 193 

 Ozophora picturata, 194 



Pachygronthinse, 193 

 Palreacmsea irregularis, 541, 564 

 Paleocystites, sp., 519 



tenuiradiatus, 513, 514, 515, 517, 

 518, 522, 523, 535, 536, 537, 

 541, 543, 545, 551, 554, 555, 

 556, 566 

 Paleoneilo constricta, 151, 157, 169 

 Paleontology, Hall of, 445 

 Paleschara reticulata, 151, 161 



sp., 419 

 Pamera basal is, 194 

 Panicum proliferum, 476 



virgatum, 476 

 Parabolocratus vindis, 221 

 Paradoxides, 335 

 Paramesus twiningi, 221 



vitellinus, 221 

 Passer swainsoni, 461 

 Peale, A. C, 409, 427 

 Pecopteris, 427 

 Pediopsis basalis, 217" 



bifasciata, 217 



(deditschias, 218 



reversalis, 218 



suturalis, 217 



trimaculatus, 217 



tristis, 217 



viridis, 217 

 Pelecypoda, 81, 151, 153, 154, 169, 419 



547 

 Pelogonus americanus, 207 

 Pennsylvania Herbarium, 473, 474, 476, 



478', 479. 

 Pennsylvania, Flora of, 482 

 Pentatoma juniperina, 186 



ligata, 186 

 Pentatomidre, 184 

 PentatominK, 186 

 Penthimia americana, 220 

 Peribalus limbolarius, 186 

 Perigenes, species nova ? 193 

 Perkins, Geo. H., 594, 595 

 Peterson, O. A., i, 430, 469 



The Agate Spring Fossil Quarry, 

 487-494 

 Phacopida:, 376 



Phacops rana, 152, 155, 157, 174 

 Phasianida;, 455 

 Phillipsia, 423 

 Philophoraria, 199 

 Pliilophorus amcemus, 199 

 Philophorus walshii, 199 



