Shell small, broadly spindle shaped, spire acute and elevated with four to five tuberculated whorls, body whorl large and angulated. Aperture narrowly ovate, outer lip thick, margin crenulated, interior with four teeth, inner lip smooth with two to three pustules above short and open canal. Sculptured with prominent spiral rows of tubercles, two on spire whorls and four on the body whorl with fine scabrous threads in between, tubercles more prominent near the shoulder. Colour dark gray to black, base of tubercles white, aperture violet, outer lip teeth bluish white, columella with a dark brown patch on its posterior end.