PLATE CXLIX 



Skulls of Megacerops acer 



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



A, Female skull referred to M. acer? (Am. Mus. 6350; type of Sijmborodon altirostris Cope), Horsetail Creek, northeastern Colorado, 



Chadron formation. This figure is not as accurate as the photographic figures in Plate CXLVII. Affinity with M. bucco is 

 indicated. 



B, Type (Am. Mus. 6348), Horsetail Creek, northeastern Colorado. 



