Flattened. Dirty brown but may be tinged with violet. Orifice elongated, rhomboidal. Smooth surface but slight longitudinal folds in old specimens. Recorded up to 23 mm diameter. Thin calcareous base.
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith
