Phacoides borealis (LINNÉ)

Fossil mollusc, Phacoides borealis (LINNÉ) (bivalve); Left valve, slightly worn, interior of shell eroded, hand collected from the Quaternary (Pleistocene, Norwich Crag) deposits, of Shellpit Cottages, Thorpe Aldringham, Suffolk, England collected by Dr P.E.P. Norton, 1961