57 



Measurements of transverse series oj scutes. 



Height of apex of median keel above the level 



Height of centre of inner surface of arch above the level 



Width of inner spread of arch below 



Average height of apices of keels above inner surface of arch 



Basal breadth of the scutes (Nos. 2 and 4) on either side of the median one. . 



Basal length of same 



Thickness of bone on which the scutes rest, about 



M. 

 ■190 

 •125 

 •236 

 ■072 

 ■075 

 ■143 

 ■010 



Belly River series, Red Deer river, 1897. 



i B 



Fig. 12. — Stereocepha- 

 lus tutus. Tooth, from 

 Bed Deer river, A, 

 side view ; B, end 

 view. Twice ihe na- 

 tural size. (Provisi- 

 onally associated with 

 S. tutus.) 



The tooth shown in fig. 12, is of the Stegosauriati type. It differs 

 from those, of the Red Deer river district, referred to the t^wo species 

 of Palceoscincus, and is about twice as large as those of P. costatus. It 

 is figured here with the idea that it may eventually prove to belong 

 to iS. tutus. It was collected below Berry creek, on Red Deer river, 

 in 1901. 



A spinous dermal plate of massive proportions, fig. 13, A and 

 B, is referred to this species on account of its similarity, in structure 

 and surface markings, to the postcranial keeled 

 scutes described above. This specimen was col- 

 lected in 1897. Another large plate similar in 

 general proportions to the above and nearly as 

 large, as well as numerous others of different sizes 

 and of a variety of shapes, were collected in 1901. 



Fig. 13. — Slereot'ephalus tutus. Perraal plate from Red Deer river ; oue-si.xth the nat- 

 ural size. .4, side view; B, view from above. (Provisionally associated with S. 

 tutus. ) 



CERATOPSIDiE. 

 MoNOOLONius, Cope. 



MONOCLONIUS DAWSONI. Sp. nOV. 



Plate XVI, plate XIX, figs. 4-6, and plate XX, figs. 3 and 4. 



The remains of an apparently undescribed species of this genus, consisting of the 

 skull of one individual and the posterior crest of another, are of especial interest. The 



