Gibbula umbilicalis (Purple Topshell)

Gibbula cinerea (Grey Topshell)

Littorina ubtusata (Flat Periwinkle)

Clausinella fasciata (Banded Venus)

Chlamys tigerina (Tiger Scallop)

Useful links:

Marine Life Information Network (MarLIN) Marine bivalve shells of the British Isles