U S. NATIONAL MUSEUM PROCEEDINGS. VOL. 92 PLATE 42 
R2re 10 
Fe 2 Ra 1 
T18S 
T1I9 S| 
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a A 
Jn ten bo: 
ROS 
Portion of Benson Quadrangle, Arizona, U. S. Geological Survey, showing location of 
Benson (@) and Curtis ranch (©) fossil localities. Scale: About 3 miles to the inch. 
Contour interval: 100 feet. 
