Shell solid, white, of 7 whorls, including the blunt protoconch of 2 smooth depressed convex turns. Spire-whorls sloping, swollen above the linear somewhat undulating suture, and barely swollen below it. Base slightly contracted. Aperture oblong-oval, narrower behind, widely open in front, with a shallow notch. Outer lip simple, sharp, thickened by a marked varix outside, which ascends roundly at the suture and bounds a shallow, wide posterior sinus, profile convex, barely sinused anteriorly. Axial costae roundly trigonal, sinuous, undulating the upper suture, most valid at the swelling of the whorl, half as wide as the interspaces, vanishing towards the base, and becoming obsolete towards the aperture. Very crowded spiral incisions all over, and still finer sinuous axial growth scratches, finely granulating the surface.
Length, 6.4 mm. ; of body-whorl, 4.4 mm. ; breadth, 2.5 mm.

South Australia.