Shell very large, up to 200 mm in height, spire low, with nine angulated whorls. Aperture very narrow and small, outer lip curved posteriorly over the top of columella covering almost half of the spire, with six digitate processes pointing posteriorly, stromboid notch deep, columella and inner edge of outer lip lirate, parietal area wide. Sculptured with spiral striae on the spire, becoming coarse on body whorl, four rows of knobs on the body whorl, four large knobs on the shoulder, the last two largest and almost fused, four other rows of knobs, the lowest bearing weak knobs. Colour white, mottled with brown, outer lip, columella and aperture dirty brown.