1903.] Allen, Mammals from Northeast Siberia. l8l 



figures clearly relate to an animal very different from the 

 Vladivostok form here named E. orientalis. 



35. Sorex buxtoni, sp. nov. 

 BUXTON SHREW. 



Type, No. 18655, ? ad., July 27, 1901, Gichiga, west coast of Ok- 

 hotsk Sea, Siberia; N. G. Buxton, Jesup North Pacific Expedition. 



Summer pelage. Above, including sides, dull pale reddish brown; 

 below pale fulvous gray; tail thinly haired, bicolor, dark brown above, 

 below dull gray with a fulvous tinge; ears small, nearly concealed by 

 the fur. 



Winter pelage (May specimen) . Above dark reddish brown ; sides 

 and underparts silvery whitish gray; tail well clothed, with a distinct 

 pencil at the tip, brown above, clear gray below, darker at the tip, 

 both above and below. 



Fall pelage (September and October specimens) . Above dark 

 brown, much darker than in summer pelage; sides and ventral surface 

 gray, more or less tinged on the sides with fulvous, not pure silvery 

 gray as in spring specimens. 



Measurements. Type: Total length, 1 06; tail vertebrae, 34; hind 

 foot, 14 mm. Twenty adult males measure as follows: Total length, 

 100.3 (93 -I11 ); tail vertebrae, 34 (31-37); hind foot, 13.8 (12-15). 

 Twenty adult females measure: Total length, 95.6 (90-111); tail 

 vertebrae, 34 (30-38); hind foot, 13.9 (12-15). The average total 

 length of 40 specimens is thus slightly less than 100 mm. Of the 40 

 specimens, only 8 exceed 100 mm. in total length, and only 8 fall 

 below 95 mm. The skull of the type measures 17 mm. in total length 

 and 8 mm. in greatest width. 



This species is represented by 42 skins and skulls and 4 

 specimens in alcohol, all taken by Mr. Buxton in the vicinity 

 of Gichiga. Both sexes are about equally represented, and 

 also several seasonal phases of pelage. One specimen was 

 taken in January, i in April, 7 in July, and the others, except 

 6 taken Sept. 24-Oct. 6, at intervals between August 25 and 

 September n. They are thus mostly in summer pelage, with 

 the sides brown like the back. The single May specimen has 

 the sides and underparts clear silvery white, in strong con- 

 trast with the dark brown back. In a few specimens taken 

 in September and October the dorsal area is dark brown and 

 the sides gray like the ventral surface, but the gray is dull 



