2- 4: convex costate whorls.
1: apical non-costate whorls only slightly convex or flat-sided.
2: twelve costae on the antepenultimate whorl .
3: twelve costae on penultimate whorl.
4: eight costae on body-whorl, (5-6 visible in adapical view).
5: falciform mark crossing labial varix.
6: basal spiral line; no others visible, may be obscured by debris/growths between costae.
7: translucent, horn-coloured operculum an excentric spiral, with nucleus near columellar lip when withdrawn.

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