132 POPULAR CONCHOLOGY. 



the passage of the tendon causes its resem- 

 blance to the latter. 



85. Anomia. — Shell inequivalve, irregular, 

 attached to rocks, &c. by a calcareous mass 

 affixed to a muscle, which 

 passes through a hole in the 

 lower valve, the latter being 

 small and nearly flat. Animal, 

 foot rudimental. — 9 species 

 recent, and 1 fossil. 



From the Mediterranean and other Euro- 

 pean seas. It is found adhering to oysters and 

 other substances, rocks, &c, and takes the ir- 

 regular form of the surface to which it is 

 attached ; so that if fixed to a Pecten, it will be 

 striated, &c. It cannot be detached without 

 destroying the animal. The calcareous mass 

 by which this shell is attached is so constructed 

 as to close the hole in the valve when the 

 muscle is contracted. The animal is phospho- 

 rescent. It is eaten in France. 



