PLATE II 



Described 

 on Page 



CtenacodonserratusM.di.rsh.. i6 



Fig. I. Right lower jaw with P1.4 and M^, crown view. X 6 diam. Type. 

 Y.P.M. No. 1 1833. 



Fig. 2. Left lower jaw with 'P^_^ and M1.2, external view. X 9 diam. 

 (Type of Ctenacodon nanus.) Y.P.M. No. 11832. 



Ctenacodon laticefs ( M arsh ) . 21 



Fig. 3. Left upper jaw with P^"^ and M^"^, crown view. X 7 diam. Type. 

 Y.P.M. No. 11761. 



174 



