406 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 

 Taile of measurements of six skins of Hesperomys, <f'C. — Contiuued. 



Other interesting measurements are to be obtained from tlie two skulls 

 of Hesperomys leucopus and that of Ochetodon humilis now before me, 

 and for their convenient comparison these are also presented in a tab- 

 ulated form. 



Table of measurevients of three skulls of Hesperomys, including the type of H. Truei, and 

 of one skull of Ochetodon humilis. 



[Given in centimeters and fractions.] 



It is evident, aside from other characters given below, that the 

 extraordinary size of the ears of the mouse captured by me on the 16th 

 of March, as well as the superior dimeosious and varying ratios of the 

 diameters of its skull, eutitle it at least to distinction as a new species. 

 It gives me pleasure, therefore, to bestow upon*it the name of my es- 

 teemed friend Mr. F. W. True, curator of mammals, in the United States 

 ;Xational Museum. 



