EXPLANATION OF PLATE 6. 



Diagrams 5, 7, and part of 4, of Quarry 13, near Como, Albany County, 

 Wyoming, worked by Mr. Fred Brown for Prof. O. C. Marsli, during the years 

 1884, 1885, and 1886. The numbered bones show the positions in which the 

 various elements of tlie holotype of Camptosaurus browni. Cat. No. 4282, 

 U.S.N.M., were found in the quarry. The unnumbered bones scattered about 

 pertain chiefly to members of the Stegosiiuria. 



A, Plesiotype of Diracodon laticcps. Cat. No. 4288, U.S.N.M. 



B, Series of caudals and dermal ])lates of Stcgosaurus, Cat. No. 4714, U.S.N.M. 



The scale is about 4 feet to the inch. 

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