Cardium (Cerastoderma s.s.) lamarcki REEVE (or C. (C.) edule LINNÉ) ?

Fossil mollusc, Cardium (Cerastoderma s.s.) lamarcki REEVE or C. (C.) edule LINNÉ ? (bivalve); a left and a right valve, hand collected from the Pleistocene (Eemian) deposits, of (not stated on label), Holland collected by G. Netherlands Geological Survey Spaink