696 PROCEEDINGS OF THE NATIONAL MUSEUM. vol 41. 



free; centrum of 15th dorsal detached, although the spinous process 

 remained attached to the 16th; 16th dorsal and sacral vertebrae 

 articulated; 1st caudal free; 2d to 21st caudals articulated; 22d to 

 25th caudals articulated; 26th caudal free; 27th to 29th caudals 

 articulated; 30th and 31st caudals articulated; 35th caudal free. 



Dimensions. — The entire length of the animal, measured along the 

 backbone, is 9 feet 11 inches; from the base to the top of the hip 

 bones, 1 foot 9 inches; from base to top of head, 2 feet 8^ inches; 

 length of tail, 3 feet 6 inches. 



EXPLANATION OF PLATES. 



Plate 55. 



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

 worked by Mr. Fred Brown for Prof. O. C. Marsh, during the years 1884, 1885, and 

 1886. The numbered bones show the positions in which the various elements of the 

 type of Camptosaurus broxvni, Cat. No. 4282, U.S.N.M., were found in the quarry. 

 The unnumbered bones scattered about pertain chiefly to members of the Stegosauria. 



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



B. Series of caudals and dermal plates of Stegosaurus, Cat. No. 4714, U.S.N.M. 

 The scale is about 4 feet to the inch. 



Plate 56. 



Mounted skeletons of Camptosaurus browni Gilmore, Cat. No. 4282 U.S.N.M., 

 and C. nanus Marsh, Cat. No. 2210, U.S.N.M. 

 Type-specimens. Oblique side view. 

 About one-twentieth natural size. 



Plate 57. 



Mounted skeletons of Camptosaurus browni Gilmore and C. nanus Marsh. Type- 

 specimens. Viewed from the left side. 

 About one-twentieth natural size. 



Plate 58. 



Drawing of the skeleton of Camptosaurus browni showing the real and restored 

 parts. Original bonas are represented by line shading and parts restored are left 

 in outline. 



More than one-twentieth natural size. 



Plate 59. 



Mounted skeleton of Camptosaurus nanu^ Marsh. Oblique view. Type-specimen. 

 About one-eighth natural size. 



Plate 60. 



Rear view of Camptosaurus nanus Marsh . Showing the pose of the tail and expanded 

 body cavity. Type-specimen. 



Plate 61. 



Drawing of the skeleton of Camptosaurus nanus Marsh. Showing the real and 

 restored parts. Original bones are represented by line shading and parts restored 

 are left in outline. 



More than one-eighth natural size. 



