174 



Periptychus rhabdodon, Cope '. 

 Syn. Catathl&ua rhabdodon, Cope a . 



This species is of considerable size, and is characterized by the 

 grooved and ridged sculpture of the teeth. The dentition is repre- 

 sented in the accompanying woodcnts (figs. 24, 25). 



Hab. North America. 



Fig. 24. 



Periptychus rhabdodon. Upper (a) and lower (6) cheek-dentition, grinding 

 surface ; from the Puerco Eocene of New Mexico, f . (From the Amer. Nat.) 



Fig. 25. 



Periptychus rhabdodon. Lateral view of the upper (a) and lower (b) cheek- 

 dentition of the specimen represented in fig. 24. f . (From the Amer. Nat.) 



1 Amer. Nat. vol. xv. p. 830 (1881), CatatUmts. 



2 Loc. tit. 



