R: right, exhalant side. L: left, inhalant side. 1: anterior of body blackish dorsally. 2: piece of mucus-food. 3: mantle dark chestnut and blackish. 4: rachis (ctenidial axis). 5: very large monopectinate ctenidium. 6: food pocket in mantle skirt. 7: filament tips. 8: pallial food groove set in mantle skirt. 9: sole of foot. 10: white pedal retractor muscle. 11: yellowish anterior edge of foot. 12: cephalic tentacle. 13: mouth between lobes. 14: grey-white surface of left, inhalant, neck lobe.
Shell length 18 mm. Portland Harbour. April 2012.