. Bulletin - United States National Museum. Science. 330 A MANUAL OF AMERICAN LAND SHELLS. Pupa corticaria, Say. Shell whitish, shining, cylindrical, obtuse at the apex ; whorls rather Fig. 355. more than 5, convex; suture well impressed; aperture lat- eral, two-tbirds as wide as the last whorl, suborbicular, with a single tootb (sometimes two) on the i)arietal wall near the center, and a tooth-like enlargeinent near tlie umbilical termination of the peristome, which is white, reflected; umbilicus very minutely perforated. Length, 2i"™ ; diameter, l"""'. Odosi
. Bulletin - United States National Museum. Science. 330 A MANUAL OF AMERICAN LAND SHELLS. Pupa corticaria, Say. Shell whitish, shining, cylindrical, obtuse at the apex ; whorls rather Fig. 355. more than 5, convex; suture well impressed; aperture lat- eral, two-tbirds as wide as the last whorl, suborbicular, with a single tootb (sometimes two) on the i)arietal wall near the center, and a tooth-like enlargeinent near tlie umbilical termination of the peristome, which is white, reflected; umbilicus very minutely perforated. Length, 2i"™ ; diameter, l"""'. Odosiomia corticaria, Say, Nich. Eucycl., iv, pi. iv, fig. 5; ed. 1 (1817); (181S); Binnky's ed., 7, pi. Ixxii, fig. 5. Fupa corticaria, Say, Nich. Eucycl., iv, ed. 3, 1819, pi. iv, fig. 5.—Gould, Bost. Jouru. Nat. Hist., iii, 397, pi. iii, fig. 19 (1840); iv, 358 (1843).—De Kay, N. Y. Moll., 50, pi. iv, fig. 49 (1843).—KDsTER, iu Chemnitz, ed. 2, 27, tab. xiii, figs. ^9^, Mon. Hel. Viv., ii, 328.—Binney, Terr. Moll., ii, 339, pi. Ixxii, fig. 4.—W. G. BiNNEY, Terr. Moll., iv, 146; v, 209; L. & Sh., i, 244 (1869).—Gould and Binney, luvert. of Mass. [2], 439 (1870). Carychiiim corticaria, FI^;russac, Prodr., No. 3 (no descr.). LiucochiUi corticaria, Morse, Jouru. Portl. Soc, i, 36, fig. 87; pi. x, fig. 88 (1864).— Tryon, Aiu. Jouru. ConcL., iii, 307 (1868). • From Maine and Wisconsin to South Carolina and Mississippi. I believe, therefore, that it will prove to be found over all the Eastern Province. Animal whitish, darker upon tbe bead and eye-peduncles ; the latter are long and club-shaped j tentacles short, thick. This is a very thin and delicate shell, and has a peculiar transparency, Pig. 356. resembling spermaceti. The aperture is somewhat circular, the upper part being interrupted by the last whorl and tbe extremities of the peristome not being connected. The smaller tooth is often wanting, and sometimes both. In the number and posi
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