1: longitudinal costa.
2: four spiral ridges on same whorl raised into bosses where cross over a costa.
3: four spiral ridges on same whorl, depressed between costae.
4: furrow between ridges, about same width as ridges; contains microreticulation of growth lines and spiral striae.
5: spiral ridges, but no costae or bosses, on base of body whorl.
6: unsculptured apical protoconch, paler than teleoconch.