. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. 32 CONCHOLOGIA CESTRICA, T. fallnx. [B. & Pig. T. fallax, Say, Helix fallax, Say, Jour. Phil. Acad. F. S., v., 1825. Similar in outline; but differs from T. tridentata, in being much smaller; the spire is more elevated ; the teeth are larger ; and the upper one, of the lip teeth, is strongly inflected. H. JlA, W. 13, mill. Station, in woods, under leaves and de- cayed wood, Chester County ; common. T. introrerens, Bland. Helix introferens, Bland, Ann. N. Y. Lye. Vij., i860. Shell narr
. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. 32 CONCHOLOGIA CESTRICA, T. fallnx. [B. & Pig. T. fallax, Say, Helix fallax, Say, Jour. Phil. Acad. F. S., v., 1825. Similar in outline; but differs from T. tridentata, in being much smaller; the spire is more elevated ; the teeth are larger ; and the upper one, of the lip teeth, is strongly inflected. H. JlA, W. 13, mill. Station, in woods, under leaves and de- cayed wood, Chester County ; common. T. introrerens, Bland. Helix introferens, Bland, Ann. N. Y. Lye. Vij., i860. Shell narroivly umbilicate, depressed-globose, thin, T. infrofe- costate-striatc, pale; whorls 6, the last scarcely deflected, but deeply constricted at the aper- ture, with two exterior pits; periphery sub- angular; convex beneath, with a spiral groove laithin the lanbilicus; aperture oblique, lunate, with a strong, arcuate, parietal tooth ; peris- tome reflected, thickened within ; an obtuse, inflected, tooth, within the right margin ; at base, a submarginal, lamelliform, tooth, with a transverse tubercle in the centre; the basal lamella is continued within the aper- ture, where it forms a strong, white, tubercle. H. 7, W. 15, mill. Station, in woods, under loose bark, and moist decayed leaves. Chester County. T. introferens, var. Minor, Bland. Helix introferens, var. Minor, Bland, Ann. N. Y. Lye. Vij., i860. Shell smaller; whorls 5. H. 6, W. il, mill. Station, in woods, gardens, and among rubbish. Ches- ter 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
