unknown bivalve

unknown bivalve

Observation - unknown bivalve - UK and Ireland. Description: 3cm x 3cm off white / yellow ish rounded bivalve. Lots of fine concentric ridges. Discovered on sandy beach on east coast of Anglesey.

3cm x 3cm off white / yellow ish rounded bivalve. Lots of fine concentric ridges. Discovered on sandy beach on east coast of Anglesey.