Thracia phaseolina (LAMARCK)

Mollusc shell, Thracia phaseolina (LAMARCK) (bivalve); best shells of this sp. in the collection; dredged from seabed from the Quaternary (Holocene) deposits, of Eddystone Shell Gravel Sula A5, Eddystone, Plymouth, Devon, England collected by Plymouth Marine Biological Station