PLATE IX 



A. Skeleton of MONOCLONIUS (CENTROSAURUS) NASICORNUS, 



type, No. 5351 A.M.N.H., 1/30 natural size. 

 Courtesy of the American Museum of Natural History. 



B. Skeleton of BRACHYCERATOPS MONTANENSIS, type, No. 7951, also 



paratypes Nos. 7952-7957 U.S.N.M., 1/10 natural size. 

 Courtesy of the United States National Museum. 



154 



