Alvania scabra
Alvania scabra is a species of small sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Description
The length of the shell varies between 1.5 mm and 3 mm.The shell is longitudinally plicate, obsolete below, spirally lirate, forming mamillary tubercles. It contains 6 slightly convex whorls. The shell is white, maculated with chestnut. The outer lip is sulcate within, varicose externally.