OSTEOLOGY OF THE ARMORED DINOSAURIA. 136 



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 I 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, U.S.N.M. J nat. size. See 



plate 37, map of quan-y 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, U.S.N.M. -J- 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, U.S.N.M. J 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, iscliium, and dermal tail spines of Stegosaurus. 

 Fig. 1 . Anterior dermal tail spine of Stegosaurus stenops Marsh. Cat. No. 6629, U.S.N.M. J nat. size. 

 Lateral view. Juvenile. See p. 95. 



2. Posterior tail spine of Stcgosaitnis stenops Marsh. Cat. No. 6629, U.S.N.M. ^ nat. size. 



Oblique lateral view. Juvenile. See p. 95. 



3. Posterior dermal tail spine of Stegosaurus sulcatus Marsh. Type. Cat. No. 4937, U.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 cjollection. 



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



See p. 113. 



5. Left fibul;\ of Stegosaurus sp. ( ^at. No. 7389, U.S.N.M. ^ nat. size. Litemal view. See p. 85. 



Plate 26. 



Scapula, coracoid, and humerus of BoplUosaurus marsM ( 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 

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



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 shouldei; region , Seep. 119. 



Plate 2!i. 



Dermal plate of Hoplitosaurus m,arshi (Lucas). Type. Cat. N(j. 4752, U.S.N.M. (1) lateral 

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



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. 



