564 Bulletin American Museum of Natural History. [Vol. XIX, 



readily distinguished externally by the very small ears. Its 

 very distinctive cranial features render further comparison 

 with allied species unnecessary. 



This weasel was trapped by Mr. Anderson "in the same 

 bunch of balsam firs where the bushy-tailed rats were secured. " 



38. Gulo luscus (Linn.). WOLVERINE. 



An adult female, from Oizenoy Bay, Alaska Peninsula, June 

 7. Total length, 965; tail vertebras, 229; hind foot, 178. 

 Skull, naso-occipital length, 148; basal length, 135; zygo- 

 matic breadth, 96; interorbital breadth, 39; breadth of post- 

 orbital constriction, 34. 



39. Sorex personatus /. Geoff roy. MASKED SHREW. 



This species is represented by 34 specimens, collected as 

 follows: Telegraph Creek, 21 (13 skulls and skins, and 8 

 additional skulls with field measurements), August 2 to 15 and 

 October 1 9 ; Little Tahltan River, i , August 1 8 ; Level Moun- 

 tain, 2, September 15; Raspberry Creek, 9, October 7; and 

 Sheep Creek, i, October 14. 



The Telegraph Creek and Raspberry Creek series measure 

 as follows: Telegraph Creek, 20 specimens: Total length, 99.6 

 (96-104); tail vertebras, 40.4 (37 44); hind foot, 11.9 (1113); 

 ear, 7.6 (7-8). Raspberry Creek, 9 specimens: Total length, 

 100 (96-105); tail vertebrae, 40.8 (40-42); hind foot, 11.9 

 (11-12); ear, 7.5 (6-8). 



I also refer to this species 2 specimens taken by Mr. A. J. 

 Stone on previous trips, as follows: Liard River, i specimen, 

 Nov. 27, 1897; Fort Norman, i specimen, Sept. 17, 1898. 

 From its very dark color the first mentioned of these two ex- 

 amples was formerly referred (this Bulletin, XII, 1899, p. 9) 

 provisionally to Sorex sphagnicola Coues, but both agree well 

 with the present species, and are too small to meet the re- 

 quirements of S. sphagnicola. 



The specimens from the Telegraph Creek region do not 

 differ appreciably from specimens from northern Maine and 

 New Brunswick. 



