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THE GEOLOGY AND VERTEBRATE PA- 

 LEONTOLOGY OF UPPER EOCENE 

 STRATA IN THE NORTHEASTERN 

 PART OF THE WIND RIVER 

 BASIN, WYOMING 



PART 2} THE MAMMALIAN FAUNA OF 

 THE BADWATER AREA 



By C. lewis GAZIN 



Curator, Division of Vertebrate Paleontology 



United States National Museum 



Smithsonian Institution 



(With 3 Plates) 



INTRODUCTION 



The significance of the Wind River Basin in contributing informa- 

 tion on mammalian faunas of upper Eocene time has been appreciated 

 only during comparatively recent years. Although a rather meager 

 fauna had been known from beds of Uintan equivalence below the 

 Beaver Divide along the south side of the basin for many years, it is 

 rather surprising that the occurrences on the north side were not 

 earlier discovered, particularly in view of the long history of collecting 

 associated with the adjacent lower Eocene Wind River formation. 

 Discovery of the occurrence of upper Eocene mammalian remains 

 along Badwatcr Creek near the site of the old Badwater Post Office 

 by Wood, Seton, and Hares in 1936 was followed by investigations of 

 others, notably those of Harry A. Tourtelot for the U. S. Geological 

 Survey and parties for the Smithsonian Institution. 



The present study stems largely from an interest in Eocene tapi- 

 roids, the upper Eocene representatives of which are so well repre- 

 sented here, and is in part a sequel to an earlier review of artiodactyls 



1 Part I of this paper is a study of the geologic relations, in preparation by 

 Harry A. Tourtelot. 



SMITHSONIAN MISCELLANEOUS COLLECTIONS. VOL. 131, NO. 8 



