522 



GEOLOGU OF THE DEBTEE BASIN. 



found .-it the latter locality, are represented below in figs. 93 and 94. In 

 PI. XXIX is given the restoration of the most perfect skeleton ye1 discov- 

 ered. This figure will indicate the general form and appearance of these 

 hooted mammals, which once roamed iii greal herds over the region near the 

 lake basin where their remains are now preserved. The specimen here 

 restored was found in the Brontotherium beds of northern Nebraska. 



Marsh; sid 



UJ>^ 



skull of Titanopt eurtus Marsh n 



i malar i n, aasal ■ 5 earns 



jiiii natural 



The largesl reptile in this horizon is the huge tortoise represented in 

 figs. 95 and 96 (p. 523). 



Among the even-toed mammals, or Artiodactyls, that lived about the 

 same time, the genus Entelodon was one of the most interesting, and in 

 PI. XXX is represented the restored skeleton of one of the Largesl species 



