TROGONTHERIUM CUVIERI. 



and structure of the teeth of the TrogontTieriwm, will, I trust, 

 be allowed to yield the same grounds for its sub-generic 

 distinction, as have been proposed or accepted by the best 

 modern Zoologists for the subdivisions of the same value 

 in the rest of the Rodent Order. 



Fig. 73. 



Portion of the lower jaw of the Trogontherium, shewing the grinding surface 

 of the teeth. Nat. size. Cromer. 



