ClassVI. CARDIUM. COCKLE. 191 



Mont. Test. Br. Sup. 30. 16. fascia- 



TUM. 



# C. with an orbicular shell, pellucid ; with 

 about twenty-seven smooth, glossy, flattened 

 ribs; color rufous white, with a few brown 

 stripes; length three quarters of an inch, breadth 

 somewhat more. 



On the Cornish and Devonshire coasts. 



