26 



THE WHITE RIVER BADLANDS 



ferred to the National Museum. Much of this collecting, 

 particularly during the years 1886 ? '87, '88, was in imme- 

 diate charge of Mr. J. B. Hatcher, one of the most original 

 and successful collectors that has ever worked in the bad- 

 lands. 



The University of Princeton was first represented by an 

 expedition under direction of Professor W. B. Scott in 1882. 

 Another expedition directed by Prof. Scott came in 1890. 

 A third came in 1893, directed as before by Prof. Scott, with 

 whom was associated Mr. J. B. Hatcher. A fourth party 

 came in 1894, this time under the full direction of Mr. 

 Hatcher. ( Plate 8 ) . The results of these expeditions were of 

 very great importance. The abundant fossil remains collected 

 enabled Prof. Scott to describe in most complete manner a 

 number of the more noted extinct animals and to indicate 

 with more certainty their proper classification and rela- 

 tionship. 



The American Museum of Natural History entering the 

 field in 1892, was favored from the very first by important 

 discoveries. Since the first expedition, several parties have 



Figure 3 — Areal distribution of Oligocene and Miocene exposures in 

 South Dakota, Northwestern Nebraska, and Eastern Wyoming. 

 N. H. Darton, modified by Matthew and Thomson, 1909. 



