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Show 460 MR. HARPER PEASE ON POLYNESIAN LAND-SHELLS. [May 2, The above is the first species described from the Marquesas group of islands. The shell is rather thin, somewhat obliquely ovate, finely and closely marked by striae of growth, of a reddish or reddish horn-colour ; whorls three, the last slightly swollen and rather oblique; whorls of the spire convex, the apex mammillary, suture strongly impressed; aperture oblong-oval, almost vertical; lip thickened on its edge, red; columella but slightly curved, margin thickened, distinctly plicate posteriorly. SUCCINEA RUBELLA, Pse. T. tenuis, suboblique ovata, striis incrementi tenuiter rugosula, rubescens,- anfr. 2_, ultimus convexus, obliquus; anfr. rotundato-convexi, apice papnllari; sutura bene impressa ; fere recta, acute ovata, labro tenui, columella arcuata, incrassato; perist. simplex, marginibus callo tenui junctis. __lt. 12, diam. 7 mill. Hab. Insula Lanai. Genus TORNATELLINA, Beck. TORNATELLINA GRACILIS, Pse. T. elongata, gracilis, tenuis, nitida, leevigata, striis incrementi tenuissime notata, fusco-cornea; anfr. 5, convexi, ultimus planu-lutus, interdum medio concentrice sulcatus; apertura parva, ovata ; lamina parietalis valida, prominens ; columella forte tortuosa. Alt. 3|, diam. 1^ mill. Hab. Insula Kauai. TORNATELLINA DENTATA, Pse. T. oblongo-ovata, tenuis, fragilis, nitida, laevigata, fulvo-cornea; anfr. 4\, convexi; sutura impressa; apertura parva, acute oblongo-ovata; lamina parietalis valida, compressa, prominens; columella forte callosa, tortuosa, vix compressa, medio dente munita. Alt. 2\, diam. 1\ mill. Hab. Insula Hawaii. The peculiarity of this little species is, that the columella, in addition to the usual callosity, which in this species is somewhat compressed, is furnished with a prominent tooth on its middle. Tornatellina striata, Newc, described in Proc. Cal. Acad. 1861, p. 93, I exclude from the genus, transferring it to the genus Leptachatina, Gld. Genus VERTIGO, Miiller. Dr. Gould remarked in his description of V. tantilla, in the ' Report of the American Exploring Expedition,' that it was the first species of its type he had met with from Polynesia. It has |