The Probert Encyclopaedia of Nature

COCKLE

The Cockle (Cardium) is a genus of Lamellibranchia bivalve mollusc found on British shores. The general characteristics are: shells nearly equilateral and equi-valvular; hinge with two small teeth, one on each side near the beak, and two larger remote lateral teeth, one on each side; prominent ribs running from the hinge fo the edge of the valve.
Research Cockle