The shell is shaped like a Phrygian cap with the pointed crown curved backwards to 24% of shell-length from the posterior. The protoconch is a minute spiral of two whorls on the right posterior of the apex (1).
The anterior profile is convex and the posterior concave. Vacant shell with most brown staining removed.
L. 5.8 mm, W. 4.6 mm, H. 3.2 mm, Menai Strait, Wales, March 2015.