174 



TTXGTTLATA. 



Periptychus rhabdodon, Cope 1 . 



Syn. CatathlcBUs rhahdodon^ 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). 



Hab. 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. 



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



dentition of the specimen represented in fig. 24. 



(From the Amer. Nat.) 



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



Loc. cit. 



