Shell small, 5.4 mm., narrowly ovate-cylindrical, spire not shouldered and body-whorl tall and narrow, very gradually tapered to a short, scarcely differentiated, distinctly emarginate anterior canal. Protoconch proportionately very large, of three whorls, small tipped, but rapidly enlarged, last 1 ½ whorls with closely spaced protractively arcuate axial riblets. Aperture very long and narrow. Outer lip varicose, base bearing a broad shallow stromboid notch. Anal sinus broad and deep constricted at its entrance by the labial varix and a thick parietal callus pad; no other apertural denticles or processes. Sculpture of flexuous narrow ribs and weak intercostal spiral threads.