Fig. I. — Map of western Wyoming and portions of adjacent States showing Eocene 

 sedimentary basins, with nearby Paleocene fossil localities numbered as follows: 

 I, Bison basin Tiffanian; 2, Polecat Bench Puercan to Clarkforkian ; 3, Buckman 

 Hollow Clarkforkian (Almy) ; 4, Wagonroad ridge and Dragon Canyon, Puercan and 

 Dragonian (North Horn). Map reproduced from Osborn, U, S. Geo!. Surv. Monogr. 

 55, figs. 9. 49. 1929. 



