Shell small, attenuately fusiform, or broader and abbreviate, smooth, white or buff in colour, whorls nine, of which two arc nuclear, glassy, buff or white, the remainder furnished with con¬tinuous, obliquely running, longitudinal ribs, rounded centrally, five in number on the upper whorls, on the body-whorl about three or four, very pronounced, and conspicuously extended. Between the continuous oblique ribs the surface of the shell is smooth or occasionally delicately striate with revolving lines. A twisted appearance pervades the whole exterior. Mouth small ; outer lip slightly thickened. Just below the suture is a white, bulbous callus ; the sinus attached below this is deep and widely-expressed ; columella straight, base abbreviate, very faintly spirally lined.