1: mantle-skirt translucent buff, reveals dark-brown radiating bands of shell.
Mantle cavity consists of 2: nuchal cavity over head , and 3: pallial groove filled with pallial gills around entire periphery of foot-head.

4: efferent pallial vessel in mantle-skirt, close to pallial-groove, enters 5: nuchal cavity on left.
6: sole of foot pitch-brown.

Length 30mm. Lleyn, Wales. September 2015.