Post veliger juvenile.

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.

9.3 mm high. Anglesey. September 2015. Leg. J. Light.