f 



232 PROCEEDINGS OF THE ACADEMY OF 



last molar exhibits five shallow tubercles with minute dentinal 

 islets at the summits. 



The size of the animal was but little greater than the domestic 

 mouse. The molar series measures 3 lines in length. From the 

 front of the incisor to the back of the last molar measures 4| 

 lines. The relations of this extinct rodent I have not determined, 

 nor can I refer it to any genus with which I am familiar. It may 

 be named Mysops minimus. 



On favorable report of the committee, the following paper was 

 ordered to be published : — 



[November 21, 



