3. Aclis succincta, n. sp. Plate XXVIII, fig. 4.

Shell very small, turreted, perforate, hyaline and somewhat shining. Sculpture consisting of spiral threads, one upon the middle of the shoulder, the second (most prominent of all) on the angle of the shoulder, the third (slightly finer) a little below the periphery, and the fourth just above the suture; base with a few additional spiral liræ; the whole crossed by oblique rather distant axial lines reticulating the interstices and extending over the base; the axial sculpture by far not so conspicuous as the spiral. Colur light-horny. Spire turriculate, much higher than the aperture; outlines straight. Protoconch small, obtuse, spirally sharply ridged. Whorls 6. regularly increasing, distinctly shouldered, and angularly narrowed again below the periphery; base convex. Suture distinct, margined above by the fourth spiral. Aperture subvertical, oval. Peristome discontinuous, sharp. Columella vertical, somewhat arcuate, a little broadened and subtruncate below. Perforation narrow, open. Operculum unknown.

Diameter, 1.1 mm.; height, 2.6 mm.

Type in my collection.

Hab.—Near the Snares Islands, in 50 fathoms (Captain Bollons). One specimen.