1. Cerastoderma edule. Shell length 22.9mm. Hinge of right (upper image) and left valves. 2 cardinal teeth centrally in each valve. Right valve; 2 anterior and 2 posterior lateral teeth. Left valve; single anterior and posterior lateral tooth. Dee Estuary.
2. Cerastoderma edule. Shell length 22.9mm. Hinge of right (upper image) and left valves. 2 cardinal teeth centrally in each valve. Right valve; 2 anterior and 2 posterior lateral teeth. Left valve; single anterior and posterior lateral tooth. Dee Estuary.

Cerastoderma edule. Shell length 22.9mm. Hinge of right (upper image) and left valves. 2 cardinal teeth centrally in each valve. Right valve; 2 anterior and 2 posterior lateral teeth. Left valve; single anterior and posterior lateral tooth. Dee Estuary.