Marked with fine lines, ridges, or grooves; furnished with transverse ridges (often used in the description of shells).
Last whorl excavated beneath, finely lirated, and of a uniform brownish white or pale pink tint, with a rather acute ridge circumscribing the base.
The spire of eucosmius is more slender, has 8 ribs instead of 7, and the outer lip is always smooth, while it is strongly lirated in miocosmius.