Very early-stage post-veliger juveniles starting to develop spire, as usual for snails, but lack operculum and periostracum. Shell entirely translucent white.

1: ovoid body-whorl 96% (left) 92% (right) of height.

2: very small spire developing from discoid larval protoconch; 4% (left) 8% (right).

3: thin, semi-circular palatal (outer) lip.

4: D-shaped apertures 89% and 88% of shell-height, wide open basally, narrowing adapically.

5: adapical angle narrow.

6: very short, thin columellar lip basally.

2.2 and 3mm high. Uist, Scotland. Circa 1900. Coll. National Museum of Scotland, accession z.1970.63.39a. © S.Pye.