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

1: very small spire developing from discoid larval protoconch; 4% (smallest) to 8% (largest) of height.

2: ovoid body-whorl 96%(smallest shell) 92% (largest shell) of height.

Heights 2.2, 2.3, 2.6, 2.9 and 3 mm. Uist, Scotland. Circa 1900. Coll. National Museum of Scotland, accession z.1970.63.39a. Copyright S.Pye.