8 Index 



Page 



Ordovician fossils 89 



Ordovician in Ohio 376 



Orothceras (Dawsonoceras) hammelli, sp. nov 74 



Orthoceras (Loxoceras) milleri, sp. nov 76 



Orthoceras (Ormoceras) hitzi, sp. nov 77 



Orthoceras (Spyroceras) bilineatum-frankfortensis, sp. nov 75 



Orthorhynchula linneyi, James 24 



Pasceolus camdenensis, sp. nov 85 



Peace of Paris, 1783 418 



Pennsylvanian in Ohio 378 



Permian glaciation 209 



Permian in Ohio 379 



Piracy, river 386 



Platystrophia acutilirata, Conrad 65 



Platystrophia clarksvillensis, sp. nov 65 



Platystrophia colbiensis, sp. nov 55 



Platystrophia colbiensis-mutata, var. nov 56 



Platystrophia colbiensis-precursor, var. nov 57 



Platystrophia crassa, James 59 



Platystrophia cypha, James 61 



Platystrophia laticosta, Meek 58 



Platystrophia morrowensis, James 60 



Platystrophia profundosulcata, Meek 58 



Plectorthis dichotoma, Hall 49 



Plectorthis equivalvis. Hall 46 



Plectorthis fissicosta, Hall 48 



Plectorthis jamesi, Hall 50 



Plectorthis neglecta, James 52 



plectorthis plicatella, Hall 49 



Portage river 395 



Pottsville formation in Ohio 267 



Preliminary notes on Cincinnatian and Lexington fossils of Ohio, Indiana, 



Kentucky and Tennessee 17 



Properties of building-stone 143 



Proterozoic glaciation 208 



Pterinea (Caritodens) demissa, Conrad 71 



Quercus imbricaria, microscopic study of 323 



Quercus leana, historical sketch of 315 



Rafinesquina declivis, James 43 



Rafinesquina winchesterensis, sp. nov 42 



Relief features of Ohio 381 



Remote drainage of Ohio 387 



Rhynchotrema dentata, Hall 29 



Rhynchotrema dentata-arnheimensis 27 



River history 385 



River sediments '. 374 



Rocky river 398 



