The distinctive rounded shells of cockles are symmetrical, are heart-shaped when viewed from the end, and in most but not all genera there are numerous pronounced ribs.
In most but not all genera there are numerous pronounced ribs. The distinctive rounded shells of cockles are symmetrical, and are heart-shaped when viewed from the end.
The distinctive rounded shells of cockles are symmetrical, and are heart-shaped when viewed from the end. In most but not all genera there are numerous pronounced ribs.
The distinctive rounded shells of cockles are symmetrical, and are heart-shaped when viewed from the end. In most but not all genera there are numerous pronounced ribs.