. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. p, cLurhajnCfss Wit^ ada, 111, i, 1884, page 23, plate 3, fig. 12, side view of a speci- men from Durham, Canada West; 12 ^, another showing mouth; crowded transverse striae; shell extremely thickened at the periphery of the last volute, so as to make an exactly circular mouth; a curious feature seen also in Pterocheilus primus^ Moore, from English Lias, Differs from P. hispiralis^ Hall, in more obliquely flattened spire, etc.— Guelph formation. Vb\ Pleurotom
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. p, cLurhajnCfss Wit^ ada, 111, i, 1884, page 23, plate 3, fig. 12, side view of a speci- men from Durham, Canada West; 12 ^, another showing mouth; crowded transverse striae; shell extremely thickened at the periphery of the last volute, so as to make an exactly circular mouth; a curious feature seen also in Pterocheilus primus^ Moore, from English Lias, Differs from P. hispiralis^ Hall, in more obliquely flattened spire, etc.— Guelph formation. Vb\ Pleurotomaria depressa, Cox. (The name depressa was '7/7.^i^Xif/U' jgtt^ used twice before Cox described this species, which must therefore be re- named). Geol. Sur. Ky., Vol. 3,1857, (:c "'^s^C-';"^ .\ page 569, plate 8, fig. 10, enlarged; 10 a^ natural size. Common in the rock shale of No. 11 coal, at Bonharbour and Airdrie, Kentucky. Upper coal measures, XV,—See P. modesta below, P. disjuncta, Hall, Pal. N. Y. Vol. 5, ii.— Till c, P. dispersa, Dawson, Acad. Geol. 310.—XIII? Pleurotomaria docens, Billings. Geology of Canada, 1863 pagel32,fig. 63 a^ view ot the spiral; 63 6, side view; 63 <?, part of the band magni- Hed, Chazy limestone. II 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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