PLATE XXVI. 
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 
arich purple, others pale red, brown, or deep yellow, and all with a 
silvery hue. 
