Shell depressedly conoidal, with nearly flat base, sharply keeled, yellowish-white, with a large umbilicus; whorls about 6, slightly convex; nucleus smooth, upper whorls with concentric ribs; on the third whorl they are pointed above, at some distance from the suture, and near the base of this whorl, appears a row of tubercles on a spiral rib. The subsequent whorls are slightly concave or canaliculated near the suture, the fourth is sculptured by concentric ribs, with stronger tubercles at the top, near that depression; on the fifth, the sculpture consists of a row of tubercles and 3 beaded lirae, of which the third, near the keel is the strongest, this keel is compressedly crenulate, the space between suture and tubercles has short, irregular folds. The same sculpture persists on the last whorl, where the tubercles, about 30 in number, are compressed and show a tendency to become double, the crenules of the keel are slightly concave from above to below. Base nearly flat with 5 concentric beaded lirae, the beads bordering the umbilicus are the largest; the whole base is covered with rather regular, riblike striae and very fine microscopic ones, visible also on the upper part of the shell. Umbilicus large, occupying from the base of columella to the opposite side, about 2/3 of the diameter of the shell, it is funnel-shaped, pervious, its wall spirally striate, with a single, spiral, beaded rib and radiating plicae. Aperture rhombic, probably not quite developed, thin, upper margin convex, basal one nearly straight; columellar margin slightly convex, reflected above, parietal wall with a thin layer of enamel. Diam. maj. 13 mm, alt. 6,5 mm; apcrt. alt. 3,25 mm, lat. 5,5 mm.

Indonesia. Maluku. Kepulauan Kai.