1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 243 



Syncqytonii/s. Lower molars resembling those of Fhenacomys and 

 Synaptomys, but with the external border of enamel merely crenulate, 

 with no external reentrant angles, or triangles of dentine, except in 

 the middle of the last tooth, where there is a short indentation. 

 Tyjje. — M, infVdifus, as below. 



MICTOMYS INNUITUS, new species. 



Size moderate. Ears well developed, rounded, about as long as the 

 fur immediately in front of their base. Five tubercles on the hind 

 feet; soles hairy. Claws well developed, compressed. Upper surfaces 

 grayish brown, as in 8yncq)tomys. Under surfaces gray. Face pale 

 brown. Lips, end of nose, and chin, white. Feet pale brown. Tail 

 bicolored, pale brown above, white below. Ears clothed with rather 

 long and sparse brown hairs. 



Dimensions (from alcoholic specimen ; type). — Head and body, 88 mm. ; 

 tail vertebne, 15 mm. ; terminal pencil, 5 mm. ; ear, from base of orifice, 

 9.5 mm.; hind foot (without claw), 15 mm. 



Type. — No. 14838, U. S. N. M., nursing female. Fort Ohimo, Lngava, 

 Labrador. Collected b}^ L. M. Turner; spring, 1884. 



