. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Rhynchonella subtrigonalis. {Atrypa suhtrigonalis^ Hall, Pal. N. Y. Vol. 1, 1847, Tren- ton). Emmons, A. S. I, ii, page 190, plate 10, fig. 12, a^ 5, c ; tapers to a small beak; about 20 folds, 3 in the '° middle channel. Trenton. II c. Rhynchonella tennesseensis, Roemer, Sil. Fauna, W. Tenn., 1860, Pal. Ohio, Vol. 2, 1875, page 136, plate 7, figs. 16, 17, dorsal and ven- tral views of internal cast from Yellow Springs, O.; - i .. -/w» shorter than it wa
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Rhynchonella subtrigonalis. {Atrypa suhtrigonalis^ Hall, Pal. N. Y. Vol. 1, 1847, Tren- ton). Emmons, A. S. I, ii, page 190, plate 10, fig. 12, a^ 5, c ; tapers to a small beak; about 20 folds, 3 in the '° middle channel. Trenton. II c. Rhynchonella tennesseensis, Roemer, Sil. Fauna, W. Tenn., 1860, Pal. Ohio, Vol. 2, 1875, page 136, plate 7, figs. 16, 17, dorsal and ven- tral views of internal cast from Yellow Springs, O.; - i .. -/w» shorter than it was before the thick shell at the beak was dissolved away. Species easily known by its broad, sub- triangular shape, and coarsely plicated surface, with broad sinus and ridge, especially when looked at in front. Niagara. Vh. Ehyn. tJialia. See Stenoschisma billing^sii. Villa. Rhyn. tetJiys. See Stenoschisma tethys. VIII a^ * Rhynchonella uta. ( Terehratula uta^ Marcon, Geology of of N. America, Coal Meas- ures.) BhynGhonella osag- ensis^ Swallow, Transact. St. Louis Acad. Sci. Vol. 1, 1858. Geol. Illinois, Vol. 5 plate 25, figs. 22 a, b.) Oollett's Indiana Et., 1882, page 132. plate 25, fig. 6, enlarged^ ventral view, closely related to the L. Carboniferous Rhynchonella ottumwa^ and ranging from In- diana to N. Mexico; throughout U. Coal Measures. XV? Rhynchonella vellicata, Hall. Pal. N. Y. Vol. 3,1859. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lesley, J. P. (J. Peter), 1819-1903; Pennsylvania. Board of Commissioners for the Second Geological Survey. Harrisburg, Board of Commissioners for the Geological Survey
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