08 Lacuna vincta

08 Lacuna vincta

The operculum is a transparent, pale horn-coloured, ovoid, rapidly expanding spiral. Periostracal flap extends beyond aperture-lip. Colour of bands brighter inside aperture where not covered by periostracum.
Shell height 5.8 mm. Menai Strait, August 2013.
Full SPECIES DESCRIPTION at flic.kr/p/gTkfF4

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