Top left: Height 4mm, 57% of breadth. Body whorl 86% of height. Aperture 64% of height.
Bottom left: Height 6.6mm, 57% of breadth. Body whorl 85% of height. Aperture 60% of height. Adapical angle about a right angle.
Right: Height 13mm, 83% of breadth; highest h/b % in collection of 71 shells from S. to N. coasts of Britain. Body whorl 71% of height. Aperture 52% of height.