Shell waxy white, smooth, glistening, elongated, rather acute at both extremities; whorls eight or nine, the nucleus and nuclear ones as in the last except that they are less strongly sculptured ; next the suture, which is by them distinctly marked, a succession of (on the last whorl sixteen) little squarish knobs, not continued anteriorly in any way, but looking as, if they had been pinched up from the interspaces between them ; on the back of the canal are two or three spiral threads, remainder of shell without trace of spiral sculpture ; lines of growth very flexuous, indicating a deep broad emargination near the suture ; but the shell is so excessively thin and brittle that I can find, among many specimens, none with a perfect aperture, but suppose from the growth lines that the outer lip was rounded out broadly, while the canal is very narrow, the pillar extremely thin, sharp and straight, making the aperture narrowly lunate. There are variations in slenderness and in the prominence of the sutural knobs, otherwise this is one of the most characteristic abyssal species and wholly unlike any of the shallow-water Bela’s. Last whorl twenty-seven forty-fourths of the shell. Long. 11.0 mm Lat. 4.0 mm. Aperture equal to the spire above the last whorl.

Shell delicate. translucent, glassy white, ovate-fusiform, acute at both ends. Whorls nine, slightly convex, with a small, nodulous, subsutural shoulder. Nucleus small, brown, acute, of three whorls, which are obliquely sculptured. Other whorls polished and shining, but, in some lights, often showing faint, microscopic, oblique lines, and lines of growth; the nodules below the sutures are smooth and rounded, small, and separated by intervals about equal to their breadth; canal with a few spiral lines close to tip. Aperture fusiform; notch broad, canal short, narrowed to the end. Length, 9.5 mm. greatest breadth, 4,5 mm, length of body-whorl and canal, 6 mm; of aperture, 4.75 mm; breadth of aperture, 2 mm.
Four living specimens of this elegant shell were taken off Martha's Vineyard

Yucatan Strait