. Bulletin - United States National Museum. Science. EASTERN PROVINCK NOivTIIERN RKGION SPECIES. l89 Pupa decora, Gould. Shell minute, cylindrical, rounded at apex, thin, shining, translucent, of a "wine-yellow color, regularly striated by lines of growth; ^i"-1^^- spire of 5 or 6 closely revolving, rounded whorls, deeply sep arated at the sutures; aperture nearlj^ round or semioval, obliquely limited by the penultimate whorl, armed with 4 slender denticles, the largest of them on the parietal wall, 1 on the columellar portion of the peristome, and 2 on the outer portion, all dispose
. Bulletin - United States National Museum. Science. EASTERN PROVINCK NOivTIIERN RKGION SPECIES. l89 Pupa decora, Gould. Shell minute, cylindrical, rounded at apex, thin, shining, translucent, of a "wine-yellow color, regularly striated by lines of growth; ^i"-1^^- spire of 5 or 6 closely revolving, rounded whorls, deeply sep arated at the sutures; aperture nearlj^ round or semioval, obliquely limited by the penultimate whorl, armed with 4 slender denticles, the largest of them on the parietal wall, 1 on the columellar portion of the peristome, and 2 on the outer portion, all disposed so as to form the arms of a cross; the peristome is slightly reflexed and indented opposite the base of the two labial denticles; at the columella it rises against a distinct um- bilical perforation. Length, 2^"""; diameter, 1^""". Pui)a decora, Gould, Proc. Bost. Soc. Nat. Hist., ii, 263 (Dec, 1847), with a wood- cut; in Terr. Moll., ii, .327, pi. Ixxi, tig-. 3.—Pfeiffer, Moii. Hel. Viv., iii, 555.—W. G. BiNNEY, Terr. Moll., iv, 143; v, 201, L. & Sh., i, 238 (1868.)—Gould and Bixney, Inv. of Mass., ed 2, 435 (1870). Pupilla decora, Tryon, Am. Jonru. Conch., iii, 304 (1868). Near Lake Superior; Fort Eesolutiou, Great Slave Lake. It thus appears to be a species of the Northern Eegion. Animal unobserved. Pupa Hoppii, Moller. Shell subperforate, cyliudrically ovate, thin, very delicately striated, horn-colored, shining, pellucid; spire terminating in an ob- rio^igo. tuse cone; whorls 5, rather convex, the last scarcely equaling two-fifths the shell's length, ascending above, somew4iat nar- rowed towards the base; columella deeply subplicate, pari- etal wall of the aperture furnished with one tooth-like callus; aperture vertical, subsemicircular; peristome thin, scarcely expanded, its right termination quite arched. Length, 2f'"'"; '^eai'a^;' diameter, 1"™. PupaHoppii, Moller, lud. Moll. Gr., 4 (1842).—Tro
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