Douglass : Titanotheres from Uinta Deposits. 



311 



buttress on the antero-external portion of the tooth, which makes the 

 anterior margin oblique. The inner cusps (deuterocones) are low with 

 rounded summits. They are more nearly opposite the postero-exter- 

 nal than the antero-external cusp. There are inner cingula on P^ and 

 Pi. The antero-internal cusp in M 2 is quite high and Mi conical. 



Fig. 7. Lateral View of Skull of D. heterodon Douglass. (| nat. size.) 



The postero-internal cusp is due simply to an increase in height of the 

 cingulum. 



This skull was found by Mr. J. F. Goetschius. 



Measurements. 



Mm. 



Total length of top of skull from end of nasals to crest of occiput 5°° 



From anterior of orbit to front of nasals 160 



From anterior of orbit to posterior part of narial opening to front of nasals. 55 



Width of occiput 128 



Height of occiput 140 



Length of molar premolar series 1 90 



Length of premolar series 75 



Length of molar series 1 15 



Length of P^ 20 



Width of P2 . 16 



Length of P^ 21 



Width of P3 20 



Length of P± 24 



Width of P^ 27 



Length of M 1 , 34 



Width of Mi 35 



Length of M^ 46 



Width of M* 42 



Length of Mi 48 



Width of Mi 42 



