46 



S-IG. 1 



FIG. 4 



xi 



xi 



FIG. 2 



FIG. 5 



FIG. 3 



FIG. 6 



xi 



Coossified nasals and horns of Megacerops angustir/fnis as seen from above (fig. 1), from the front (fip;. 2), and from the left 

 side (fig. 3), for comparison with the nasals and horns of Megacerops coloradtnsis ^similarly viewed (figs. 4, 5 and 6 after Leidy). 

 One-fourth the natural size. Figs. 1-3 after Cope. 



