the Marsh Collection, etc. 



Ul 



parapet of the mandible rapidly ascends posterior to M ly 

 so that a line from the posterior edge of the alveolus of 

 M 3 to the base of the canine passes through the tip of the 

 protoconid of the sectorial ; in A. taxoides and A. ivheeler- 

 ianus, through the anterior base of the paraconid of M x . 



Fig. 



tOO 5 7 TYPE 

 Y. P. M. 



Fig. 9. — 2Elurodon taxoides magnus, mut. nov. Holotype. X V^- Right 

 lateral view of part of maxillary and premaxillary with teeth. 



This upward trend of the parapet is analogous to that in 

 A. ursinus, which species has been referred to the Amphi- 

 cyonine group. In other respects, however, this new 

 individual is not like Amphicyon. Another differentia- 

 tion lies in the fact that the length of the inferior pre- 

 molar series of A. luheelerianus is less than that of the 



Fig. 10. 



/0057 TYPE 



Y. P. M. 



Fig. 10. — JElurodon taxoides magnus, mut. nov. Holotype. X 1/2- Eight 

 palatal view. 



molar series, while in both A. taxoides and the Yale 

 specimen the premolar length exceeds the molar by one 

 fifth. 



The superior canine was large and, in cross-section, 

 oval-shaped, and separated from the external incisor by 

 a considerable diastema, while on the other side it was in 



Am. Jour. Sct. 

 31 



Fifth Series. Vol. Ill, No. 18.— June, 1922. 



