SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 131, NUMBER 4 



Cljarlesi S. anb jWarp "^aux OTalcott 

 jResiearcl) Jf unb 



NEW CRETACEOUS BRACHIOPODA 

 FROM ARIZONA 



(With 4 Plates) 



By 

 G. ARTHUR COOPER 



United States National Museum 

 Smithsonian Institution 





^Ml^ 



(PUBUCATION 4227) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



DECEMBER 21, 1955 



