Transparent shell reveals colours of soft parts within shell.
1: yellow/orange hermaphrodite gonad.
2: brown digestive gland interspersed with black excretory cells.
3: brown and opaque white marks in mantle.
4: single conspicuous brown oval in hypobranchial gland.
5: mantle cavity contains no ctenidium or osphradium.

Shell height 1.6 mm, Anglesey, Wales, May 2016.