OSTEOLOGV OF THE ARMORED DINOSAURIA. 135 



Plate 24. 



Dermal plates from tail of Stegosaurus stenops Marsh. 

 Fig. 1. Distal tail plate of Stegosaurus stenops Marsh. Cat. No. 4714, U.S.N .M. About £ nat. size. 

 Plate 37, map of quarry 13, No. 177, quarry 13, diagram 5; also 177, fig. 58. This plate is 

 correlated with No. 17 of specimen No. 4934, plate 3. See p. 93. 



2. Dermal tail plate of Stegosaurus stenops Marsh. Cat. No. 4714, TJ.S.N.M. | nat. size. See 



plate 37, map of quarry 13, diagram 5, No. 76; also 76, fig. 58. This plate is correlated with 

 No. 16 of specimen No. 4934, plate 3. See p. 93. 



3. Dermal plate of Stegosaurus stenops Marsh. Cat. No. 4714, TJ.S.N.M. £ nat. size. See plate 



37, map of quarry 13, diagram No. 75. This plate is correlated with No. 15 of specimen No. 

 4934. See plate 3; also 75, fig. 58. See p. 93. 



4. Dermal tail plate of Stegosaurus stenops Marsh. Cat. No. 4714, TJ.S.N.M. £ nat. size. See 



plate 37, map of quarry 13, diagram 5, No. 10; also 10, fig. 58. This plate is correlated with 

 No. 14, specimen No. 4934, plate 3. See p. 93. 



Plate 25. 



Fibula, ischium, and dermal tail spines of Stegosaurus. 



Pig.]. Anterior dermal tail spine of Stegosaurus stenops Marsh. Cat. No. 6629, TJ.S.N.M. J nat. size. 



Lateral view. Juvenile. Seep. 95. 



2. Posterior tail spine of Stegosaurus stenops Marsh. Cat. No. 6629, TJ.S.N.M. i nat. size. 



Oblique lateral view. Juvenile. See p. 95. 



3. Posterior dermal tail spine of Stegosaurus sulcatus Marsh. Type. Cat. No. 4937, TJ.S.N.M. 



\ nat. size. Viewed from the side. See p. 110. 



4. Left ischium of Stegosaurus longispinus Gilmore. Type D 54, University of Wyoming collection. 



£ nat. size, b, process which meets the pubis; i, iliac articulating border; s, symphysis. 



See p. 113. 



5. Left fibula of Stegosaurus sp. Cat. No. 7389, U.S. N.M. J nat. size. Internal view. Seep. 85. 



Plate 26. 



Scapida, coracoid, and humerus of Hoplitosaurus marshi (Lucas). 

 Fig. 1. Distal half of humerus of Hoplitosaurus marshi (Lucas). Type. Cat. No. 4752, U.S. N.M. 

 About J nat. size. See p. 115. 



2. Proximal half of the left humerus of Hoplitosaurus marshi (Lucas). Type. Cat. No. 4752. 



U.S. N.M. About J nat. size. Front view. See p. 115. 



3. Portion of right scapula and coracoid of Hoplitosaurus marshi (Lucas). Type. Cat. No. 4752, 



U.S. N.M. J nat. size. Lateral view, a, acromion process; c, coracoid; g. glenoid fossa. 



See p. 115. 

 Plate 27. 



Dermal elements of Hoplitosaurus marshi (Lucas). Type. Cat. No. 4752, U.S. N.M. Mass of 

 dermal scutes and ossicles shown as found in situ. Less than J nat. size. See p. 118. 



Plate 28. 



Dermal plate of Hoplitosaurus marshi (Lucas). Type. Cat. No. 4752, U.S. N.M. J nat. size. 

 External view, probably represents the type of spine adjacent to the shoulder region. See p. 119. 



Plate 29. 



Dermal plate of Hoplitosaurus marshi (Lucas). Type. Cat. No. 4752, U.S. N.M. (1) lateral 

 view; (2) posterior view of same. Both figs. J nat. size. See p. 120. 



Plate 30. 



Dermal plate of Hoplitosaurus ;marshi (Lucas). Type. Cat. No. 4752, U.S. N.M. (1) lateral 

 view; (2) posterior view of same. Bora figs. £ nat. size. See p. 120. 



