XII ILLUSTRATIONS. 



Page. 



Fig. 66. Humerus of Triceratops prorsus, posterior view 60 



67. Ulna of Triceratops prorsus 61 



68. Radius of Triceratops serratus 61 



69. Metacarpals of Triceratops 61 



70. Phalanges of Triceratops 62 



71. Femur, tibia, and astragalus of Triceratops prorcus 63 



72. Fibula of Triceratops serratus 64 



73. Metatarsals of Triceratops .- 64 



74. Dermal spines and ossifications 65 



75. Parietal of type of Monoclonius crassus Cope 73 



76. Frontal and postfrontal of ? Monoclonius crassus, with supraorbital horn core 74 



77 . Sacrum of type of Monoclonius crassus 75 



78. Anterior cervicals of type of Monoclonius crassus 76 



79. Posterior median dorsal of type of Monoclonius crassus 77 



80. Anterior dorsal of type of Monoclonius crassus 77 



81. Anterior caudal of type of Monoclonius crassus 77 



82. Right ilium of Monoclonius crassus 78 



83. Ischium of Monoclonius crassus 78 



84. Right scapula and coracoid of Monoclonius crassus 78 



85. Right humerus of Monoclonius crassus 79 



86. Right femur of Monoclonius crassus 79 



87. Tibia of Monoclonius crassus 79 



88. Fibula of Monoclonius crassus 80 



89. Right pterygoid of type of Monoclonius fissus Cope 81 



90. Type of Monoclonius recurvicornis Cope 86 



91. Type of Monoclonius sphenocerus Cope - 88 



92. Type of Monoclonius dawsoni Lambe 89 



93. Parietal of Centrosaurus apertus Lambe, originally referred to Monoclonius dawsoni by Lambe 90 



94. Sacrum of Trachodon referred to Monoclonius dawsoni by Lambe - 91 



95. Sacrum of Trachodon, side view 92 



96. Type of Monoclonius canadensis Lambe 94 



97. Anterior dorsal of Monoclonius canadensis 95 



98. Type of Monoclonius belli Lambe 97 



99. Skull of Stegvceras validus Lambe 99 



100. Type of Stegoceras validus - 99 



101. Skull of Meiolania platyceps Owen 101 



102. Tail sheath of Meiolania platyceps 101 



103. Supraorbital horn cores of type of Ceratops montanus Marsh 102 



104. Supraorbital horn cores and occipital condyle of type of Cei-atops montanus 103 



105. Vertebral centrum of type of Memos pondylus gigas Cope 114 



106. Type of Triceratops alticornis Marsh 115 



107. Type of Triceratops horridus Marsh . - 121 



108. Right supraorbital horn core of Triceratops sp 128 



109. Anterior part of skull of type of Triceratops prorsus Marsh 129 



110. Predentary of type of Triceratops prorsus 130 



111. Type of Triceratops galeus 132 



112. Supraorbital horn core of type of Triceratops sulcatus Marsh 133 



113. Frontal region of skull referred to Triceratops sulcatus 134 



114. Right mandible of Triceratops elatus Marsh 137 



115. Nasal horn core of Triceratops elatus 137 



116. Anterior portion of nasals of type of Triceratops obtusus Marsh 140 



117. Right dentary of type of Triceratops obtusus 140 



118. Type of Torosaurus latus Marsh 151 



119. Type of Torosaurus gladius Marsh 154 



120. Dermal ossicles of Nodosaurus textilis Marsh - 156 



121. Judith River beds, Cow Creek, Montana 176 



122. Valley of Red Deer River, Alberta 177 



123. Valley of Red Deer River, Alberta - 178 



124. Triceratops, rear view 189 



125. Triceratops prorsus 190 



