Flesh greyish white, translucent. Intensity of grey pigment varies from very pale to almost black. Extensive white pigment marks on sides of foot and posterior of head, with a few white marks extending beyond the eye on the base of the tentacle.
Female, as no penis behind head. Most populations in Britain, Europe and USA have no males, only parthenogenetic females.
Shell height 4.5 mm. Freshwater pool. Dee Estuary, Cheshire. September 2011.