TEETH OF THE MESOZOIC !MAMMALS 



Fir-. 8. Triconodon (Priacodon). Upper Jurassic, America. Internal view. x|. After Marsh. 



FIG. 9. Mena.coi.lon. External and internal views, xf. Upper Jurassic, America. After Marsh. 



FIG. 10. Tiiiodon. Upper Jurassic, America. 

 Internal view. xf. After Marsh. 



FIG. 11. Spahtrntlicriiiiii. Upper Jurassic, 

 England. Internal view, enlarged. 



FIG. 11. Upper and lower teeth and lower jaw of Triconniln,! j\ /-us from the Purbeck Ueds. 

 Upper Jurassic (Lower Cretaceous), England, x IT. 



Figs. 7-lla. Jurassic Triconodonta. Lower Teeth and Jaws. (All enlarged.) For 

 the natural size of Figs. 5, 6, 7, 11 see Figure 4. 



