54 



SINCLAIR— THE SMALL ENTELODONTS 



and one half miles northeast of Scenic, Pennington County, South 

 Dakota, and about a mile south of where "71 Table," the local name 

 for a mesa-like area of high plain, ends. In this specimen all the 



Fig. I. A. Archccotherium mortoni, No. 12624 Princeton University Geo- 

 logical Museum. Left side of slightly distorted skull, about one fifth the 

 natural size; view not in absolute profile. Large size-variant with reduced 

 cuspidation in m' and crowded anterior lower premolars. B. Archaothe- 

 rium mortoni, No. 12709 Princeton University Geological Museum. Left 

 side of uncrushed skull, about one fifth natural size; view in absolute profile. 

 Small size-variant with unreduced cuspidation in m^. 



lower teeth except the last two molars had fallen from the jaw 

 previous to fossilization, but the alveoli of the cheek teeth are well 

 preserved and in contact, with the exception of those for the two 



