D. S. GEOLOGICAL SURVEY 



MONOGBAPH 55 PLATE CLVI 



SKULL OF MEGACEROPS BUCC07 



Referred female skull, skull 0> (Nat. Mus. 4705), Big Badlands, S. Dak., Titanotherium zone, upper levels of middle part 

 (Hatcher). One-fourth natural size. Vertical crushing has probably emphasized the breadth and flatness. This 

 is regarded by the author as a female skull of M. bwcco 



