. Bulletin - United States National Museum. Science. 222 A MANUAL OF AMERICAN LAND SHELLS. Jaw as usual in the geuus. Liugual membrane (Terr. Moll., V, Plate III, Fig. I) witli 2o-l-L*5 teeth; 3 laterals and 1 transition tooth on each side. Zoiiites placeiitula, Siiuttlewouth. Shell widely umbilicated, very much, depressed, arctispiral, very shining, marked by irregular, distant, impressed striie, horn- color, diaphanous, below of uniform color; whorls 7, most gradually increasing, scarcely convex, the last convex below, subexcavated around the umbilicus; aperture oblique, lu- nate; peristome
. Bulletin - United States National Museum. Science. 222 A MANUAL OF AMERICAN LAND SHELLS. Jaw as usual in the geuus. Liugual membrane (Terr. Moll., V, Plate III, Fig. I) witli 2o-l-L*5 teeth; 3 laterals and 1 transition tooth on each side. Zoiiites placeiitula, Siiuttlewouth. Shell widely umbilicated, very much, depressed, arctispiral, very shining, marked by irregular, distant, impressed striie, horn- color, diaphanous, below of uniform color; whorls 7, most gradually increasing, scarcely convex, the last convex below, subexcavated around the umbilicus; aperture oblique, lu- nate; peristome simple, acute. Greater diameter 7i, lesser (Jimm. height, 3'"™. Near Z. demissus, but most readily distinguished by its j^^^.^ depressed shell, its wider umbilicus, and especially bj^ the absence of the heavy, opaque, white callus in the aperture on the base of the last whorl. (Shuttl.) Zonites placeniula, Siiuttleworth, Bern. Mit., 1852,194.—Gould, in Terr. Moll., iii, 19.—Pfeiffer, Mon., iii, 631.—W. G. Binney, Ann. N. Y. Ac. Sc, i, pi. xiv, fig. A. A species of the Cumberland Subregion, having been received from the mountainous region of Tennessee (Jalapa, «&c.); from Whitley County, Kentucky ; from Lexington, Ya. I have also received it from the Hot Springs of Arkansas, proving that it has the southwestern range beyond this subregion noticed in many of its species. It is also quoted, but incorrectly, from Colorado by Ingersoll. Animal with distinct locomotive disk, longitudinal furrows, and cau-' dal mucus pore. This species has been confounded with Z. capsella, but differs greatly in many particulars, especially in its general outline, number of whorls, width of umbilicus. There are sometimes 8 full whorls. The jaw and lingual membrane described as those of this species in Terr. Moll., V, are no doubt those of Z. LawL Zonites Wlieatleyi, Bland. Shell umbilicated, depressed, thin, shining, pellucid, brownish liorn- FiG 237 colored, finely str
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