Shell elongated, with about fourteen or fifteen whorls, the first two nearly smooth, the remainder with fine longitudinal threads and strong, revolving ridges, of which there are three on each of the spire whorls, the central one the strongest. On the body whorl are many revolving ridges which become fainter at the base, and throughout the shell there are fine intermediate revolving threads. Sinus rather shallow, wide, placed at second ridge below the suture; canal long, rather narrow. Upper whorls brownish tinted, rest of the shell white; Epidermis thin, horn colored. Length, 100 mm; diameter, 30 mm.