PLATE XI 



Described 

 on Page 



Laolestes grandis Simpson. 64 



Fig. I. Right lower jaw with M^.^, crown view. X 9 diam. Type. Y.P.M. 

 No. 13727. 



Amblotherium gracilis (Marsh). 66 



Fig. 2. Right lower jaw with M5.7, internal view. X 12 diam. Y.P.M. No. 

 13732. 



Fig. 3. Left lower jaw with P4 and M1.4, external view, and P3 (de- 

 tached, on matrix anterior to P4), internal view. X 12 diam. Type. 

 Y.P.M. No. 1 1883. 



192 



