SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 123, NUMBER 7 



(End of Voujme) 



Cfjatlesi 3B. anb iWatp "^aux OTalcott 

 i&e£featcl) jFunb 



EARLY CENOZOIC VERTEBRATES 



IN THE RED CONGLOMERATE 



AT GUANAJUATO, MEXICO 



(With 1 Plate) 



By 

 CARL FRIES, JR. 



U. S. Geological Survey 



CLAUDE W. HIBBARD 



University of Michigan 

 AND 



DAVID H. DUNKLE 



U. S. National Museum 



(Publication 4181) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



FEBRUARY 17, 1955 



