212 



MOLLUSKS: ACEPHALS. 



dred pounds, and two feet across, are used as vessels 

 for the holy water. The Tridaena lives in the Pa- 

 cific and Indian Oceans. 



Fig. 432. Pecten. From Cape Ann 

 southward. 



Fig. 433. My tilus. Both 

 shores of the Atlantic. 



Fig. 434. Avicula. Fig. 435. Leda. 

 Reduced. Mediterranean. New England. 



Fig. 436. Cardicum. 

 Reduced. New England. 



OYSTERS, PECTENS, MUSSELS, PEARL-OYSTERS, &c. 



Oysters are more highly prized for food than any 

 other mollusks. They occur in the greatest quanti- 

 ties on the coast of the Middle States, especially in 

 Delaware and Chesapeake Bay. 



Pectens, or Scallops, Figure 432, are also prized for 



