. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. Opevculutn of A. litnosfi. â [Stimp.] Tig. A. decisti [W. G. B. Fig. 168. A. decisa, Haldeman, Mon. Lim., 1842. Shell, short, conical, smooth, shining; whorls 5 ; base slightly perforated; aperture dilated, semicircular; color pale green ; slightly translucent. H. 4, W. 2)4, mill. Station, Brandywine Creek, Chester County ; not common. A. grana, Say. Paludina grana, Say, Jour. Acad. Phila., II., 1822. A. ff ran ft. Shell, vcrv small, conic-ovate; whorls ;, [W. G. B.] ' -^ ' ' â " Fig, 1
. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. Opevculutn of A. litnosfi. â [Stimp.] Tig. A. decisti [W. G. B. Fig. 168. A. decisa, Haldeman, Mon. Lim., 1842. Shell, short, conical, smooth, shining; whorls 5 ; base slightly perforated; aperture dilated, semicircular; color pale green ; slightly translucent. H. 4, W. 2)4, mill. Station, Brandywine Creek, Chester County ; not common. A. grana, Say. Paludina grana, Say, Jour. Acad. Phila., II., 1822. A. ff ran ft. Shell, vcrv small, conic-ovate; whorls ;, [W. G. B.] ' -^ ' ' â " Fig, 169. convex, smooth; aperture orbicular, sub-an- ^^ gular; umbilicate. L. 2, W. i}4, mill. Station, in ponds, on fallen leaves. Picker- ing Creek, Chester County ; abundant. Genus BYTHINELLA, Moquin Tandon, 1851. Shell, elongated-ovate, turreted; umbilicus generally closed; apex obtuse; aperture oval, or rounded, slightly thickened. Animal, with the foot rather long, narrow, and round- ed behind; tentacles setaceous and pointed; verge bifid; the longer branch not coiled about the shorter one; operculum sub-spiral; concealing the posterior part of 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 Hartman, William Dell, 1817-1899; Michener, Ezra, 1794-1887. Philadelphia, Claxton, Remsen & Haffelfinger
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmollusks, bookyear187
