. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Modilopsis nasuta. (Cypricardites modiolaris and nasutus. Emmons, page 403, fig. 112, 4, Loraine {Hudson river) forma- tion^ (Conrad, Ann. Et. N. Y. 1841.) Like Pterinea carinata it occurs only in this formation, and is never seen in the Tren- ton or Utica (Emmons).—///5. Modiolopsis nais, Billings. Geology of Canada, 1863, p. 143, fig. 81 a {See under M, maia above) right valve; b dorsal view. Trenton group II c. Modiolopsis perlatus, Hall, 28th Kt. N. Y. Mu
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Modilopsis nasuta. (Cypricardites modiolaris and nasutus. Emmons, page 403, fig. 112, 4, Loraine {Hudson river) forma- tion^ (Conrad, Ann. Et. N. Y. 1841.) Like Pterinea carinata it occurs only in this formation, and is never seen in the Tren- ton or Utica (Emmons).—///5. Modiolopsis nais, Billings. Geology of Canada, 1863, p. 143, fig. 81 a {See under M, maia above) right valve; b dorsal view. Trenton group II c. Modiolopsis perlatus, Hall, 28th Kt. N. Y. Museum, Doc. Ed. 1876, pi. 27, figs. 3,4, copied into Collett's Indiana report of 1881, p. 315, pi. 28, fig. 3, right valve char- acteristic of the species; fig. 4 hinge view showing its great convexity or roundness.—Niagara^ Vh. Modiolopsis pholadiformis, Hall. See Appendix. Modiolopsis rhomboidea, Hall. Dawson's Acadian Ge- V-vi ^—^ 2oiology, 1868, p. 600, fig. 203; surface evenly striated, concentrically; front muscular scar very strong, back scar less so but still very conspicuous and subduplicate; some resem- blance to M. priniige7iius { Unio primigenius., Conrad, Ann. Rt., N. Y., 1838, Medina sandstone).^ but less ventricose in the middle. &c. Arisaig, Nova Scotia.— Vf Modiolopsis truncata, Hall. See Appendix. Modiolopsis subalatus, Hall. Pal. N. Y., Vol. 2, 1852, plate 27, figs. 5, 6; 28th An. Rt. of Museum, 1879. Collett's Indiana report of 1881, /•-qy\ p. 315, plate 28, fig. 5J left valve of a form closely resembling the M. subalatus. 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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