i899-] Matthew, Fresh-Watc)- Tertiary of the West. 5^ 



VII. WHITE RIVER. 



The localities tabulated below are : 



1. Colorado. — Headwaters of Cedar, Lewis, Horsetail, and 

 Pawnee Creeks in northeast Colorado. Fauna described by 

 Cope in 1873 and later. The Lower, Middle, and Upper White 

 River are represented. Cope's collections were from the lower 

 and middle beds. Horizons A and B ; the fauna of Horizon C is 

 -determined from collections by the American Museum Expedition 

 of 1898. 



2. N'ebraska. — Hat Creek Basin, adjoining the S. Dakota 

 White River. Lower, Middle, and Upper White River are 

 present. 



3. South Dakota. — This is the largest and best known area. It 

 lies between and about the White and Cheyenne Rivers, and 

 furnishes the typical section. The Lower or Titanotherium Beds 

 are divisible into three subzones, the Middle or Oreodon Beds 

 into two subzones, and the LTpper or Protoceras Beds probably 

 into two subzones of which the uppermost one bears a generally 

 scanty fauna. 



4. North Dakota. — A small area near White Buttes contains a 

 fauna apparently near to the Protoceras fauna in age. 



5. Montana. — I have here included the lower beds of the Dee}) 

 River valley, which Prof. Scott considers as Upper John Day. 

 That they are later than the uppermost part of the White River 

 (Horizon C, Leptauchenia Beds) is, I think, not proven, and they 

 belong geographically to the White River. 



6. Canada. — Swift Current Creek in the Cypress Hills, N. ^^'. T. 

 The area is limited and the rocks conglomeritic, so that the speci- 

 mens were largely fragmentary. They are preserved in the 

 Museum of the Geological Survey of Canada. 



