. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Walcott . ISB. ; versa. Walcott. Am. J. S. Vol. 29, Feb. 1885, p. 116, fig. 3, outline of interior of ventral valve, apex of triangular projec- tion in front of the hole (foramen) broken ofi*; fig. 4, cast of interior of ventral valve; fig. 6, interior ot flattened dorsal valve: fig. 7, cast of an uncompressed dorsal valve. From the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Walcott . ISB. ; versa. Walcott. Am. J. S. Vol. 29, Feb. 1885, p. 116, fig. 3, outline of interior of ventral valve, apex of triangular projec- tion in front of the hole (foramen) broken ofi*; fig. 4, cast of interior of ventral valve; fig. 6, interior ot flattened dorsal valve: fig. 7, cast of an uncompressed dorsal valve. From the. 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
