Philbertia asperrima (BROWN)

Mollusc shell, Philbertia asperrima (BROWN) (gastropod, dog whelk); apical part 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