About three months post-veliger juvenile. 9.3 mm high. Shell entirely translucent white; lacks operculum and periostracum.
1: body-whorl ovoid; 100% of shell-height; no sculpture apart from fine prosocline growth lines.
2: small spire of three convex whorls with distinct sutures, 5% of shell-height.
3: D-shaped aperture.
4: thin, fragile palatal (outer) lip.
5: inhalent siphon testing water before animal emerges from shell.
6: bright yellow viscera.

Anglesey. September 2015. Leg J.Light.