. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. 70 CONCHOLOGIA CESTRICA. H. trivolvis, Say. Planorbis trivolvis, Say, Nich. Encyc, Amer. Ed., 1816. Shell, pale brownish-yellow, sub-cari- nate above and beneath, especially the inner whorls; whorls 3-4, fine ridge- striate ; spire concave ; aperture large ; lip thickened, reddish within, vaulted on its shorter side; umbilicus wide, shallow. H. 8, W. 17-13, mill. Station, ponds and streams. Chester County; Please note that these images are extracted from scanned page images that may have
. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. 70 CONCHOLOGIA CESTRICA. H. trivolvis, Say. Planorbis trivolvis, Say, Nich. Encyc, Amer. Ed., 1816. Shell, pale brownish-yellow, sub-cari- nate above and beneath, especially the inner whorls; whorls 3-4, fine ridge- striate ; spire concave ; aperture large ; lip thickened, reddish within, vaulted on its shorter side; umbilicus wide, shallow. H. 8, W. 17-13, mill. Station, ponds and streams. Chester County; 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
