60 



BULLETIN 16 9, UNITED STATES NATIONAL MUSEUM 



T^NIOOONTA' 



Figure 1.— Diagram showing the relative abundance of identifled individuals of the various orders an 

 families of mammals in the National Museum collection from the Qidley Quarry. 



LOCALITIES 



24,25> 

 S0,8t. 



ORDER 



GIDLEY SILBERLING SCARRITT 

 QUARRY QUARRY QUARRY 



FAMILY 



(P.NYCTITHERIID-^ IN 

 GIDLEY QUARRY LESS THAN 

 y^ PERCENT.) 



Figure 2.— Comparison of relative abundance of families of mammals at various localities In the Crazy 

 Mountain Field, Mont. Abundance is indicated for each locality by percentages of identifled individuals 

 in the National Museum collection. Four Lebo surface localities (combined) and the three principal 

 quarries are compared. 



