44. Odostomia (s. str.)marginata, n. sp. Plate XXV,fig. 37. Shell small, ovate, white and shining, almost smooth, with a margined suture and angled body-whorl. Sculpture consists of distinct flexuous growth-lines, irregularly spaced, and with much finer incremental striæ between them; with a magnifying-power of about thirty diameters distant fine spiral striation can be made out. Colour white, shining, porcellaneous. Spire elevated, conical, about the same length as the last whorl. Protoconch consisting of about two smooth whorls, the nucleus heterostrophe, tilted. Whorls 6, flatly convex, the last angled at the periphery; base convex. Suture impressed, distinctly margined below. Aperture vertical, pyriform, angled above, rounded and slightly effuse below; peritreme discontinuous. Outer lip sharp, flatly convex, sharply rounded at the base. Columella with a very distinct tooth just below the junction with the body-whorl, concave below. Umbilicus represented by a distinct chink. Operculum unknown. Altitude, 4·5 mm.; diameter, 2·3 mm. Type in the Colonial Museum, Wellington. Obs. One adult and a few young shells, all dead. From our nearly allied O. angasi, proxima, and vestalis it may at once be distinguished by the distinct margination of the suture and the angled last whorl. 45. Eulimella levilirata, n. sp. Plate XXV, fig. 38. Shell small, subulate, imperforate, many-whorled. Sculpture consisting of microscopic fine close and linear spiral grooves, crossed by very fine unequally spaced growth-lines. Colour white, glossy. Spire long and subulate. Protoconch smooth, with a heterostrophe, minute rounded and lateral nucleus. Whorls 7, slowly and regularly increasing; sides flatly convex, base rounded. Suture well impressed and distinct. Aperture in our only specimen imperfect, very likely subquadrate, broadly angled above. Outer lip partly broken off, sharp, convex. Inner lip forming a thin layer on the body, more callous on the straight rounded columella; basal part of peritreme broken off. Altitude, 6 mm.; diameter, 1·4 mm. Type in the Colonial Museum, Wellington. Obs. One dead shell only. Distinguished from the other two New Zealand species, deplexa and cœna, by the presence of spiral sculpture. 46. Pyramidella (Syrnola) tenuiplicata, n. sp. Plate XXV, fig. 39. Shell minute, subulate, imperforate, white and porcellaneous, with a long spire and pointed apex. Sculpture consists of some