DISCO'V'EEY OF THE TITANOTHERES AND ORIGINAL DESCRIPTIONS 



189 



The teeth are very similar to those of Dolichorhinus heterodon, 

 so much so that, if only the teeth were known, they might be 

 referred to that species. They, as well as the skul), are larger. 



Measurements [Douglass] 



Millimeters 



Length of top of skull 590 



Length of free nasals 150 



Length of skull posterior to anterior portion of orbit 393 



Width of skull at glenoid articular surface 267 



Width at infraorbital shelves 247 



Millimeters 



Length of p' 24 



Width of p3 ■. 25 



Length of p^ 27 



Width of p* 31 



Length ofm' 30 



Width of m', about 37 



Length of m^ 37 



Width of m2 44 



Length of m^, about • 41 



Width of m3, about 43 



A2 



FiGUKE 136. — Type (holotype) of Dolichorhinus longiceps 



Carnegie Mus, 2347. After Douglass, 1909. Ai, Palatal view of skull, somewhat less than one-third natural size; Aj, left lateral view of skull, somewhat less than 



one-third natural size; A3, crown view of right upper premolar series, one-half natural size. 



Length of molar-premolar series 192 



Length of premolar series 88 



Length-of molar series 112 



Length of p' 15 



Width of pi 11 



Length of p^ 20 



Width ofp2 20 



Etymology. — longiceps, in allusion to the long skull. 



Present determination. — For the reasons stated above 

 it appears that this form is connected with the typi- 

 cal D. Jiyognathus by a skull of intermediate char- 

 acters. Its status as a distinct species is therefore 

 somewhat doubtful. 



