46 
Explanation of Plate X. 
Figure 3U Triceraiops elatus Marsh; side view of nasal horn-core from the 
right; one-fourth natural size. After Hatcher, 
Figure 2. Eoceratops canadensis Lambe,' nasal horn-core viewed from the 
right; one-fourth natural size. 
Figure 3. Brachyceratops montanensis Gilmore; right lateral aspect of nasal 
hom-corer one-half natural size. After Gilmore. 
Figure 4. Brachyceratops dawsoni (Lambe); right lateral aspect of nasal 
horn-core ; one-sixth natural size. 
