PLATE CXLVII 



Skulls of Megacerops acer 



Plate prepared under the direction of Professor Cope. Side view. One-fourth natural size. (See p. 545, also PI. CXLVI) 



A, Type (Am. Mus. 6348), Horsetail Creek, northeastern Colorado, Chadron formation. 



B, Female skull referred to M. acer? (Am. Mus. 6350), Horsetail Creek, northeastern Colorado, Chadron formation. This is 



Cope's type of Symborodon altirostris. The canine tooth, which has since been lost, was more robust than in the supposed 

 female figured in Plate CXLV. 



