Shell small, pale brownish fading to white, with an inverted smooth nucleus and nearly six subsequent whorls; suture appressed; whorls well rounded, strongly sculptured; axial sculpture of numerous equal threads with wider interspaces, the threads most visible in the inter¬spaces of the spirals; the sutural region is somewhat constricted; spiral sculpture of (on the spire two, on the last whorl three) strong cords near the periphery, with wider interspaces, more or less angulating the whorls, and more or less nodulous at the intersections with the axial sculpture; besides these there are fine threads between the suture and the posterior cord, and also on the base; the reticulation is only conspicuous between the larger cords; base rounded, imper¬forate; the aperture rounded with simple, not thickened margins. Length of shell, 6.5; of last whorl, 3.3; diameter, 3.3 mm. U. S. Nat. Mus. Cat. No. 108090.
Off Fernandina and Georgia, not rare. Also in 640 fathoms, Yucatan Strait.

Nearly all the species of this genus have a patulous extension of the anterior part of the peristome resembling the obsolete notch of Bittium. The absence of varices, and, when not decollate, the heterostrophe nucleus asymmetrically set on edge, are distinctive characters. There are some features strongly suggesting relations with Triptychus.