58 



STRANGE DWELLINGS. 



Our next example of the burrowing molluscs is the well- 

 known Pholas, popularly called the Piddock {Pholas dadylus), 

 the shells of which are extremely plentiful upon our coasts, 



PHOLAS IN WOOD. 

 LITHODOMUS. 



RAZOR SHELL. 



HOLES OF PHOLAS 

 IN ROCK. 



whether empty and thrown upon the beach, or still adhering to 

 the living animal and deeply sunken in the rock. Almost in 

 every part of our shores the Piddock is to be found wherever 



