. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. beak to the lower valve. {Atrypa scitula; Atrypa circe.) Hall, Report on the Fourth Dis- trict, JS. Y., 1843, page 171, fig. 67, 1, a very scaly shell, with hardly perceptible concentric lines, but a characteristic long Williamsville, Erie Co., N. Y. Cor- niferous {Upper Helderherg) limestone. VIIIa. Meristella (?) unisulcata. Hall, {Atrypa unisulcata, Conrad, 1841,) 14th An. Rt. 1861, p. 101; 15th An. Rt. 1862, pi. 2, f. 17, a cardinal view of a well-preserv
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. beak to the lower valve. {Atrypa scitula; Atrypa circe.) Hall, Report on the Fourth Dis- trict, JS. Y., 1843, page 171, fig. 67, 1, a very scaly shell, with hardly perceptible concentric lines, but a characteristic long Williamsville, Erie Co., N. Y. Cor- niferous {Upper Helderherg) limestone. VIIIa. Meristella (?) unisulcata. Hall, {Atrypa unisulcata, Conrad, 1841,) 14th An. Rt. 1861, p. 101; 15th An. Rt. 1862, pi. 2, f. 17, a cardinal view of a well-preserved form, from the Upper Helderberg limestone, in which there is a ridge-like fold on the dorsal valve, parallel with and close to the hinge- line or cardinal margin of the valve. In fig. 18, a specimen from the Hamilton group, this fold is more oblique, rising from. 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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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
