. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. YIH^ Perry Co. See Cat. 000, specimen 11-7 (two.)—F/- F//. Platyceras squalodens, Whitfield, Ann. N. Y. Acad. Sci., Vol. 2, 1882. VppeT Helderherg, Villa. Platyceras striatum, new species., Simpson, Trans. Amer. Phil. Soc. Philadelphia, 1889, page 457, fig. 27, 1, dorsal view, fig. 21, front view. Based on Randall's specimen 950-4 C of his collections near Warren, Pa. — Shell subconical; apex not incurved or bent • body essentially straight' sides a little cu
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. YIH^ Perry Co. See Cat. 000, specimen 11-7 (two.)—F/- F//. Platyceras squalodens, Whitfield, Ann. N. Y. Acad. Sci., Vol. 2, 1882. VppeT Helderherg, Villa. Platyceras striatum, new species., Simpson, Trans. Amer. Phil. Soc. Philadelphia, 1889, page 457, fig. 27, 1, dorsal view, fig. 21, front view. Based on Randall's specimen 950-4 C of his collections near Warren, Pa. — Shell subconical; apex not incurved or bent • body essentially straight' sides a little curved from the base to the apex ; right and left sides equally developed; width at the base, length of anterior and posterior sides equal. Or the anterior side is a narrow, angular, conspicuous carina extending from the apex to the base; on the posterior side are three oblique, broad, promi- nent, rounded ridges, with depressions between them, which are wider than the ridges. Aperture oval. The bases of all the specimens observed are attached to the rock so that the form of the peristome cannot be definitely ascertained. Surface marked by comparatively strong, radiating striae, which are y. 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
Size: 1787px × 1398px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
