920 



EOCENE AND OLIGOCENE TITANOTHERBS OP MONGOLIA 



premaxillo-nasal junction, which are extended forward I titanothere of Wyoming and Utah. Back of this 

 into the hooded nasals that resemble the inverted, I extension is the long, tubular cranium, which in section 



Figure 776. — Crania and jaws of the type and paratype of Dolichorhinus kaiseni, 

 from the Shara Murun formation 



A, Superior view of type cranium (Am. Mus. 20252); Ai, right lateral view of type cranium and jaws (Am. Mas. 

 20252); B, palatal view of paratype cranium (Am. Mus. 20257). All one-sixth natural size. 



rounded prow of a boat. This exaggerated evolution 

 of the long and narrow nasals suggested the name 

 Dolichorhinus cornutus for the "horned long-nosed" 



is quite hollow, including the large tubular air cham- 

 bers which completely conceal the small brain case 

 below. 



