142 



THE WHITE RIVER BADLANDS 



are a little less than two inches in diameter. They were 

 formerly in the James Hall collection but are now in the 

 American Museum of Natural History. 



CKOCODILES 

 Two species of crocodiles have been described from the 

 White Kiver badlands. These were found near Sheep 

 mountain. Fragments of others have been obtained from 

 the Finney breaks near Folsom. All of the specimens are 

 from the Titanotherium beds. Besides other parts each 

 species is represented by a considerable portion of the head. 



Figure 74 — Anterior portion of head of the Oligocene crocodile, 

 Crocodilus prenasalis found in Indian draw, (a) view from 

 above; (b) view from below. Loomis, 1904. 



The author found the first of these, Crocodilus pre- 

 nasalis, in 1899. (Plate 47). In this the nasal opening is 

 placed forward hence the specific name. The part of the 

 head that is preserved is broad and short and contains the 

 root portions of eighteen teeth, two of which retain the 

 nearly complete crowns. These are conical and slightly 

 recurved and the longest is approximately one half inch in 

 length. The portion of the head preserved shows a width of 



Figure 75 — Head of the Oligocene crocodile Gaimanoides visheri. 

 Mehl, 1916. 



