SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 139, NUMBER 5 



CfjarleS B. anb Jftarp TrTatix OTialcott 

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GENERA OF TERTIARY AND RECENT 

 RHYNCHONELLOID BRACHIOPODS 



(With 22 Plates) 



By 

 G. ARTHUR COOPER 



Head Curator, Department of Geology 



United States National Museum 



Smithsonian Institution 





S@s§ 



(Publication 4382) 



CITY OF WASHINGTON 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION 

 NOVEMBER 23, 1959 

 SMITHSONIAN Mm/ - - 4tmtk 



institution NOV 2 3 1959 



