C. edule or C. glaucum?

[Emma]

Hello Dave,

Could it be Cardium pauciostracum? This was the name of the specimens they had in the Ecomuseum on the Delta. I collected them in shallow sea water, because the tide was out, on sand. They were deffinetely sea specimens because some of them had sea weed, and last year a Hexaplex trunculus had one of these shells in its grip.

Best wishes,

Emma.