1: shell height (H.) 2: body whorl height 83% H. 3: aperture height 67%H. 4: prominent tooth on white columella. 5: parietal lip is a glaze on the body whorl. 6: gently curved, almost straight in part, palatal lip on live specimens. 7: palatal lip broken back to thicker material on shell occupied by hermit crab. Shell lengths 14.2 mm, 10.2 mm and  6.3 mm. Llŷn Peninsula, Wales, September 2015. Leg. P. Brazier.