148 POPULAR CONCHOLOGY. 



and is commonly called the Chinese Parasol : 

 it is thin, rather transparent, and the interior 



is marked with rays proceeding from the 

 centre, and with a yellowish stain. The Um- 

 brella Mediterranea is from the Gulf of Ta- 

 rento, and is smaller than the preceding, also 

 differing from it in not being marked with 

 rays. 



This family is composed of animals that 

 differ principally from the two last in the situ- 

 ation of the branchiae, or respiratory organs. 

 They are placed in a cavity appropriated to 



Family 5. — Calyptrceida* 



* Les Calyptraciens, Lamarck. 



