Upon some new and other species of fossils, from the rocks of the Hudson-river group of Ohio and the western states; with descriptions

J. Hall

1861

Article

Annual report of the Regents of the University of the State of New York on the State Cabinet of Natural History and the Historic 14:89-109

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Taxa discussed in this work:

• Carinaropsis cunulae
• Carinaropsis cymbula
• Cyclonema varicosum
• Hormotomina maia
• Maclurina bigsbyi
• Phragmostoma
• Pterotheca anatiformis
• Pterotheca attenuata
• Pterotheca saffordi
• Pterotheca undulata