PLATE X. 



All figures three-fourths natural size. 

 Aphelops. 



Figs. I and 2. Lower left molars. 



Figs. 3 and 4. Second lower right premolar. 



Figs. 5 and 6. First lower right premolar. 



Figs. 7 and 8. Second lower left molar, little worn. 



Figs. 9 and 10. Lower left molar. 



Aphelops malacorhinus. 



Fig. 1 1 . First upper left molar. 



Fig. 12. Second upper right premolar. 



Fig. 13. Third upper left premolar. 



Fig. 14. Fourth upper left premolar. 



Fig. 15. First upper left molar. 



Fig. 1 6. Second upper left molar. 





