ILLUSTKATIONS. XI 



Page. 



Fig. 59. Caudal spines of Stegosaurus ungulatus Marsh, side, front, basal, and sectional views 94 



60. Caudal spines of four species of Stegosaurus, side views 95 



61. Section of the neck of Stegosaurus 97 



62. Section of the trunk of Stegosaurus 98 



63. Section of the proximal part of the tail of Stegosaurus 98 



64. Section of the distal portion of the tail of Stegosaurus 99 



65. Dermal spines of Stegosaurus sulcalus Marsh, front view 110 



66. Dermal spines of Stegosaurus longispinus Gilmore, side and back views Ill 



67. Caudal vertebrae of Stegosaurus longispinus Gilmore, side and end views 112 



68. Right femur of Stegosaurus longispinus Gilmore, front view 113 



69. Femur of Hoplitosaurus marshi (Lucas), front, back, and side views 116 



70. Dermal scutes of Hoplitosaurus marshi (Lucas), top and cross-sectional views 119 



71. Dermal plate of Hoplitosaurus marshi (Lucas), side and back views 120 



72. Restoration of Polacanthus foxi Hulke, after Nopcsa 121 



73. Dermal spine of a Ceratopsian ? dinosaur, side, front, and top views 122 



