Foot (1) and oral lappets (2) completely retracted into shell.
Foot fully expanded (3) with transverse division (4) at one third of way from anterior.
White, diffuse cylinders of faeces (5), not consolidated into pellets, not discharged into mantle cavity.
Foot (6) and extensive oral lappets (7) fully expanded.
Mouth (8) a ventral slit between lappets.
Shell length 2 mm. North Yorkshire, September 2014. (leg. Jan Light.)

02 Otina ovata