Shell small, Teredo-like, wood borer in deep sea as well as in shallow water.
 

« Shell globular-oval, equivalve, very open at the anterior side and closed behind, furnished with accessorial valves about the hinge. Hinge without the long curved tooth under the margin. Ligament none. » – W. Turton: Conchylia insularum Britannicarum, London 1822, p.253 (Addenda).