American Piddock (Petricola pholadiformis)
|Bonnet Shell||Common Limpet|
|Black Footed Limpet||China Limpet|
|Slipper Limpet||Common Tusk Shell|
|Cowrie Shell||European Cowrie|
The American Piddock has an elongated oval shell, off-white in colour with imbricated ridges and radiating lines which become markedly narrower towards the posterior end. The thicker lines towards the anterior end can clearly be seen on the inside of the shell. Up to 2½ inches long.