174 



rN<;n.\T\. 



Periptychus rhabdodon, Cope '. 

 Syn. Catathlaus rhabdodon, Cope 2 . 



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). 



Nab. North America. 



Fig. 24. 



^ ^**~ 



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

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



Fig. 25. 



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

 d'Mit it iun of the specimen represented in fig. 24. f . (From the Amer. Nat.) 



1 Amer. Nat. vol. xv. p. 830 (1881), Catathlmis. 2 Loc. cit. 



