NORTH AMERICAN CONCIIOLOGY. 



177 



Locality. 

 West coast of Mexico. 



N. Y., N. J., Mass. 



Florida. 



New York. 



California. 



California. 



California. 



44 

 44 

 44 



44 



45 



45 

 45 

 45 

 4G 

 46 

 47 



47 



Family Cardiacea. 



Cardium elatum Sowerby. 



var. 

 Grcenlandicum Chemn. 



C. edentulum Sowerby. 



var. Mactra radiata Donovan. 



var. Aphrodite columba Lea. 

 Icelandicum Chemn. (var.) 



C. pubescens Couth. 

 arcticum Sowerby. 

 magnum Bom. 



C. maculatum Gemlin. 



var. C. ventricosum Brug. 

 Mortoni Conrad. 

 Nuttallii Conrad. 

 pinnulatum Conrad. 

 quadragenarium Conrad. 

 substriatum Conrad. 

 Cardita borealis Conrad. 



Venericardia borealis Conrad. 

 Floridana Conrad. 



California. 



Gulf of California. 



Greenland. 



North Atlantic. 



B'ks of Newfoundland. 



Massachusetts bay. 



Gulf of Mexico. 



South Carolina. 

 New York. 

 Upper California. 

 Rhode Island. 

 Upper California. 

 California. 

 Rhode Island. 



Tampa Bay. 



Familv Arcacea. 



