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SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 139, NUMBER 5 



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 Eetfearcfj Jf rntb 



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 



(Publication 4382) 





NOV 2d 



v 



*\ I 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



NOVEMBER 23, 1959 



IN s4 



/ 



