Physochila griseola (Penard, 1911) Jung, 1942

Diagnosis: shell pyriform or ovoid, slightly compressed, mainly of oval or polygonal plates; aperture circular, with an strongly outward curved collar.

Habitat: in Sphagnum swamps, mosses. I have found numerous shells in samples from a peat bog along the Bert Bos path in Loosdrecht, in the central part of the Netherlands, September 2012.

Dimensions: shell 70-85 µm long, mean 75 µm (Deflandre, 1926). My measurements 78-86 µm.

Remarks: If you look carefully at the picture above, you can see that the collar seems to curve inwardly.