Philbertia gracilis (MONTAGU)

Mollusc shell, Philbertia gracilis (MONTAGU) (gastropod, dog whelk); apical fragment of shell, dredged from seabed from the Quaternary (Holocene) deposits, of Eddystone Shell Gravel Sula B2, Eddystone, Plymouth, Devon, England collected by Plymouth Marine Biological Station