. Bulletin - United States National Museum. Science. 280 A MANUAL OF AMERICAN LAND SHELLS. T. i)\flecta (Terr. iMolL, V, Plate VII, Fig. S) lias 22-1-22 teeth ou its liiignal niciiibrnTic; 7 perft-ct laterals on each side. This and the fol- lowing species have inner margimil teeth, with siiuple, not bifid, out- ing- points (c). It was bifid in the twenty-first tooth of one specimen examined, simple in the twenty-second, and bifid in the twenty-third and all beyond. There were over 2o-l-23 teeth on this membrane. Genitalia as in T. Rugeli Ti'iodopsis Bu§:eli, Shuttleworth. Shell imperforate, or
. Bulletin - United States National Museum. Science. 280 A MANUAL OF AMERICAN LAND SHELLS. T. i)\flecta (Terr. iMolL, V, Plate VII, Fig. S) lias 22-1-22 teeth ou its liiignal niciiibrnTic; 7 perft-ct laterals on each side. This and the fol- lowing species have inner margimil teeth, with siiuple, not bifid, out- ing- points (c). It was bifid in the twenty-first tooth of one specimen examined, simple in the twenty-second, and bifid in the twenty-third and all beyond. There were over 2o-l-23 teeth on this membrane. Genitalia as in T. Rugeli Ti'iodopsis Bu§:eli, Shuttleworth. Shell imperforate, orbicularly convex, with granulate striations and Fig. 311. few hairs, waxen horn-color ; spire short, obtuse; whorls 5i, rather convex, the last suddenly falling in front and strongly contracted at the aperture; aperture depressed, narrowed by a tongue-shaped, flexuose, strong parietal denticle; i^eristome reflected, within thickened, its right termination with a large, obtuse, very deeply seated eiihii'ged.' tooth (whose position is marked ou the exterior of the shell by a groove or pit), the basal terminus furnished with a smaller, transverse, submarginal denticle. Greater diameter 13, lesser 11^"""; height, 61"™. Helix Rugeli,-^n\]TTl.^yfORTii, Bern. MittheiL, 1852, 19S.—Pfeiffek, Mou. , iii, 268.—Gould, iu Terr. Moll., iii, IS.—W. G. Binxey, Terr. Moll., iv, 60, pi. Ixxviii, fig. 15; L. & Sh., i, 129 (1869).—Bland, Am. N. Y, Lye, vij, 426. Isoynomostoma Rugch, Tryox, Aui. Journ. Concli., iii, 55 (1867). Triodopsis llugeli, W. G. Binney, Terr. Moll., v, 307. Tennessee; North Carolina; Whitley County, Kentucky. A species of the Cumberland Subregion. It is in most respects similar to the i)receding species, and would be mistaken for it unless the aperture be examined. The position of the upper tooth of the peristome far within the aperture'at once dis- tinguishes it. The size is not, however, any criterion, as I have in- dividua
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