How many of us have picked up shells on beaches, turning over a smooth and perfect whorl, or marveling at the pearly shine inside a clam or mussel? We owe our fascination, of course, to the mollusks that created and lived out their lives in these structures, and then left them behind for the sea to recycle or someone to find. I hadn’t really thought much about the anatomy of shells before, but it’s time I learned. This page illustrates some of the major features of both bivalve and gastropod shells, along… Read More