Thyasira cf. croulinensis (JEFFREYS)

Mollusc shell, Thyasira cf. croulinensis (JEFFREYS) (bivalve); left hinge fragment quite fresh, dredged from seabed from the Quaternary (Holocene) deposits, of Eddystone Shell Gravel Sula B2, Eddystone, Plymouth, Devon, England collected by Plymouth Marine Biological Station.