SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 148, NUMBER 6 



CljarlEs; B. anb iMarp "^aux OTalcott 

 3^es(earcf) jFunb 



MIDDLE AND LATE TURONIAN OYSTERS 

 OF THE LOPHA LUGUBRIS GROUP 



(With Eight Plates) 



By 



ERLE g. kauffman 



U. S. National Museum 

 Smithsonian Institution 



(Publication 4602) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



OCTOBER 6, 1965 



