1. Cerastoderma edule. Shell length 22.9mm. Ribs extend inside shell to faint pallial line running parallel to margin. Adductor scar at each end of pallial line. No pallial sinus (indentation in line). Mouth of Dee Estuary, Cheshire. October 2011.
2. Cerastoderma edule. Shell length 22.9mm. Ribs extend inside shell to faint pallial line running parallel to margin. Adductor scar at each end of pallial line. No pallial sinus (indentation in line). Mouth of Dee Estuary, Cheshire. October 2011.

Cerastoderma edule. Shell length 22.9mm. Ribs extend inside shell to faint pallial line running parallel to margin. Adductor scar at each end of pallial line. No pallial sinus (indentation in line). Mouth of Dee Estuary, Cheshire. October 2011.