Cardium (Cerastoderma) cf. edule LINNÉ or ?? Cardium (Cerastoderma) lamarcki REEVE

Fossil mollusc, Cardium (Cerastoderma) cf. edule LINNÉ or ?? Cardium (Cerastoderma) lamarcki REEVE (bivalve); three with valves united (one fully opened) and one single left valve, hand collected from the Pleistocene (Tapes Zone, horizon 5c) deposits, of Reká, Tjörnes, Iceland collected by P E P Norton, July 1969