Paleontology and Geology

Contents: Oldhamia and the Rensselaer grit problem Cambrian and Ordovician fossils Notes on Ordovician Machaeridia of New York Notes on Ordovician plankton and radiolarian chert of New York Geological studies in Ulster county, New York Graptolites from Ordovician Normanskill shale at Kingston Point, Ulster county, New York Two new localities for fossils in the Ordovician Snake Hill shale of Ulster county, New York New localities for fossils in the Devonian Esopus grit of Ulster county, New York