1898.] NATURAL SCIENCES OF PHILADELPHIA. 367 



Specimens examined. — Total number of specimens examined 21, 

 from the following localities : 



Alaska: Fort Yukon, 2 ; St. Michsels, 19. 



General remarks. — Evotomys alascensis appears to be more closely 

 related to the European E. rutilus than to the Kamtschatkan E. 

 wosnessenskii or to any of the American species. It has the broad 

 skull, large audital bulla? and broad feet of E. rutilus, but differs 

 from both European and Kamtschatkan species in its long nasal 

 bones, and in the position of the rostral protuberances. 



I am permitted by the Secretary of the Smithsonian Institution 

 to published this paper here. 



