398 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



tends to favor the view that the doUchorhines which 

 frequented the river borders were subject to being 

 washed into the sandy deposits during periods of flood. 



apparently indicating no increase in speed. Dolicho- 

 rhinus longiceps may be described as dohchocephahc 

 and brachypodal. (See p. 652.) 



Figure 335. — Restoration of Dolichorhinus longiceps 

 By E. S. Christman, based on the mounted skeleton in the Carnegie Museum. One-fifteenth natural size. 



The bodily proportions of the dolichorhines were similar 

 to those of the existing forest-living pigs of Africa. 



Habits of Dolichorhinus. — We may compare Dolicho- 

 rhinus remotely with Hippidium, an aberrant South 

 American Pleistocene horse, in which an excessively 



The muzzle was rather expanded, or truncate; the 

 face was not so long as that of other titanotheres. 

 The incisors were arranged in a semicircle and made 

 some approach in form to the cropping incisors of the 

 ruminant. These teeth were also partly cupped to 



Figure 336. — Skull and lower jaw of Dolichorhinus hyognaihus 

 One-Iourth natural size. Skull, Am. Mus. 1851; lower jaw, Am. Mus. 1856. Both from White River, Uinta Basin, Utah, level Uinta B 2. 



long skull is combined with exceptionally short meta- 

 podials, in contrast with those of typical horses. 



So far as we can judge from very sparse evidence, 

 the feet of Dolichorhinus were surprisingly short, 



facilitate prehension, as in the lower Miocene species 

 of the horse. The diastema behind the canine tooth 

 is longer than in other titanotheres, as in typical 

 herbivorous forms. The canines in the males were 



