. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. Z. demissus, Binn. Helix demissa, Binn., Bost. Jour. Nat. Hist., IV., 1843. Shell depressed, yellowish, thickly striate ; base somewhat flattened, smooth; aperture sub-transverse, compressed-lunate; umbilicus very small; lip acute, thickened within the margin. H. 6, W. 10-12, mill. Station, in mountainous districts. Western Pennsylvania. Fig. 51. Phila. F. S., II. Z. gtilaris. [B. & B.] Fig. 52. Z. gularis, Say. Helix gularis, Say, Jour. Acad 1822. Shell depressed-conical, shining,
. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. Z. demissus, Binn. Helix demissa, Binn., Bost. Jour. Nat. Hist., IV., 1843. Shell depressed, yellowish, thickly striate ; base somewhat flattened, smooth; aperture sub-transverse, compressed-lunate; umbilicus very small; lip acute, thickened within the margin. H. 6, W. 10-12, mill. Station, in mountainous districts. Western Pennsylvania. Fig. 51. Phila. F. S., II. Z. gtilaris. [B. & B.] Fig. 52. Z. gularis, Say. Helix gularis, Say, Jour. Acad 1822. Shell depressed-conical, shining, dusky- yellow ; whorls 7-8, very minute at the apex; aperture transverse; lip thickened within, at base, with one, or more, elon- gated, lamelliform, teeth ; one at the base, the other more central; umbilicus covered, or very small. H. 5-7, W. 7-9, mill. Station, under wet logs, and decayed leaves caster County, Lan-. 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 Hartman, William Dell, 1817-1899; Michener, Ezra, 1794-1887. Philadelphia, Claxton, Remsen & Haffelfinger
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmollusks, bookyear187
