2 The Badland Formations of the Black Hills Region 



in the Princeton investigations, many of the best preserved 

 skeletons complete in practically every detail and mounted with 

 the greatest skill, have been clothed with flesh, life and activity. 

 Reproductions of a number of these, reference to which is made 

 on other pages, are given in this bulletin. 



The University of Nebraska sent expeditions under direc- 

 tion of Prof. Barbour in 1892, '94, '95, and '97. Much of their 

 collecting was done in northwestern Nebraska, but a consider- 

 able part of it in South Dakota and Wyoming. Prof. Todd, 

 cf the University of South Dakota, spent a brief time in the 

 field in 1894. He made a second and more lengthy visit, accom- 

 panied by several students, in 1896. 



New impetus was given the work, particularly among the 

 Miocene formations of northwestern Nebraska and eastern 

 Wyoming, by the inauguration in 1902 of explorations by the 

 Carnegie Museum of Pittsburg. This has continued to the 

 present time. Mr. Hatcher, directed much of the earlier work, 

 while later, Mr. O. A. Peterson has had charge of it. This 

 museum, as in the case of the American Museum, has been par- 

 ticularly successful, and many new and strange species have been 

 discovered and described. A discovery of special note is that 

 of the rich and important bone deposits near Agate Springs, 

 found in 1904. 



Two other institutions have each sent expeditions to the 

 Badlands, namely, Amherst College, under Prof. Loomis in 



1903, and Field Museum, under Curator O. C. Farrington, in 



1904. Amherst was also represented in northwestern Nebraska 

 in 1907. 



In addition to the expeditions equipped by the several insti- 

 tutions, various private collectors have obtained large quantities 

 of valuable material and these specimens, either directly or 

 through dealers, have found their way into the best museums, 

 both at home and abroad. Now that access to every part of the 

 Badlands is readily gained, investigators are constantly visiting 

 the region and activity in the "development of knowledge co- 

 cerning these wonderful deposits has perhaps never been more 

 vigorous nor better planned than it is at the present time. Each 

 succeeding year enhances the quality and importance of the in- 

 vestigation and doubtless this will continue true for many years 

 to come. 



GEOGRAPHICAL DISTRIBUTION 



The badland formations of the Black Hills region consti- 

 tute but a remnant of a once vast earthblanket stretching for 



