Growth lines (1). Periostracum unobtrusive, very thin, transparent, slightly yellowed (2). Colour saturation increased on image to show periostracum more clearly. The small spire distinctly protrudes (3) beyond the outer (palatal) lip of aperture in apertural and abapertural view. Shell length 6.6 mm from animal 11mm long. Dorset, England. April 2012.