1908.] MAMMALS. 249 



Compared with a series of winter skins of Microsorex hoyi from 

 Elk River, Minnesota, specimens in corresponding pelage from Fort 

 Simpson and Fort Franklin are slightly grayer above. Beneath they 

 are grayish white, lacking entirely the rusty tinge of hoyi. I am 

 unable to compare the summer pelages, the series of hoyi being 

 deficient in this respect. 



The skull of M. eximius differs from that of hoyi mainly in the 

 shape of the brain case, which is more inflated in the former. In 

 eximius, also, the unicuspids are more crowded, with the result that 

 the minute third and fifth, especially the former, are scarcely visible 

 when the crowns are viewed. 



The side glands of Microsorex are very conspicuous, occupying a 

 space about 9 mm. in length, or nearly the length of the hind foot, 

 being relatively larger than in any other shrew examined, and are 

 covered with short stiff hair of a silvery color. They are conspicuous 

 in all the males in our series taken in the summer months. 



A Microsonx taken on Muskeg Creek, Alberta, a tributary of 

 Smoky River, September 26 ; 1896, by J. Alden Loring, is in the Bio- 

 logical Survey collection. It closely resembles skins of Microsorex 

 eximius in winter pelage. Its skull, however, can not be found and 

 the spec imen is therefore only provisionally referred to the present 

 species. 



An adult male from Fort Chipewyan measured : Total length 90, 

 tail vertebra' 30, hind foot 10; five specimens of both sexes from Fort 

 Smith average !>2, 30.4, 102; one from Fort Simpson measured 85, 30, 

 10; one from Fort Franklin, 92, 34, 10. 



In the museum collection of alcoholic shrews I find 4 specimens of 

 this species from Fort Resolution, one taken in December, 1862, by 

 James Loekhart, the others collected about the same time by A. 

 McKenzie. Another (No. 59621), labeled Great Slave Lake, and col- 

 lected by John Reid. was in all probability taken at Big Island. Its 

 skull is the smallest of the series. The skull of another (No. 59624) 

 from Cumberland district. Saskatchewan, taken by MacFarlane, 

 closely resembles that of M. hoyi, and the specimen is perhaps prop- 

 erly referable to that species. 



The type of Mt'crosorc.r alnoruin, described by me, from Robinson 

 Portage, Keewatin, still remains unique, none of the large series now 

 before me equaling it in the size of the skull, especially the brain 

 case, or in the length of the hind foot. 



Myotis hicifugus (Le Conte). Little Brown Bat. 



A small bat which was dislodged from the loose bark of a poplar 

 stub near our camp 10 miles below the mouth of the Peace on dune 7, 

 1901, was probably of this species. It darted into the adjacent forest 

 and could not be found. With the exception of one or two seen on 



