PLATE XXVr. 



The Anomia Ephippium is frequently found on the common oyster, 

 to the shell of which it adheres by means of a strong tendinous liga- 

 ture, which passes through the perforation of the upper valve. This 

 Shell is of an irregular form ; the outside rugged and filmy ; the in- 

 side smooth, pearly, and glowing with a variety of elegant tints. 

 In different specimens the colours vary considerably, some being of 

 a rich purple, others pale red, brown, or dqep yellow, and all with a 

 silvery hue. 



