Sole deeply folded along medial dividing line (1). Oblique transverse divisions (2) on sole. Sole whitish where expanded and pressed onto substrate (3) (rear third of foot is on a glass slide), tawny where contracted (2) and out of contact with substrate.
Deeply digitated, inhalent, left neck-lobe (4), and smooth-edged, exhalent neck-lobe (5); both grey-yellow. Edge of glass microscope-slide (6).
Shell height 15.1 mm, breadth 15.5 mm. West Anglesey, Wales. March 2014.