new Marmot from North Siberia. 44-") 



Pall., to which it is probably most nearly allied. Back and 

 sides whitish " drab-grey," heavily mottled by the black tips 

 to the longer hairs. Individual hairs dark smoky brown for 

 three fifths their length, their ends i)ale drabby grey ; longm- 

 hairs black, with a median ring of dull whitish. Centre of 

 face black, the hairs dark to their bases ; this colour no 

 doubt, as in other species, turns to a reddish brown when 

 faded. Region of whiskers pale rusty ; cheeks grey, like the 

 body. Ears and a small patch behind their posterior bases 

 bright ferruginous. Under surface dull rusty, faintly ligliter 

 along the middle line, not sharply dctinod on sides. Lips an 1 

 thin blackish. Limbs pale greyish, gradually becoming dull 

 rusty terminally. Tail about one fourth the length of the 

 head and body, greyish at its base, more drabby mesially, and 

 with an inconspicuous black tuft terminally; underside dark 

 brown. 



Skull conspicuously smaller than in A. camischaticus or 

 sihiricus. Nasals narrow, evenly tapering backward, squarely 

 truncated behind. Zygomata not widely expanded. Back 

 of palate without marked median spine. Teeth of the usual 

 proportions, their combined length over 3 millini. less than in 

 A. camtschaticus. 



Dimensions of the type (measured in skin) : — 



IJead and body 505 millim. ; tail 113 ; hind foot (s. u.) 

 c. 65 ; ear 25. 



Skull : greatest length in middle lino 84 ; basilar length 

 72*5 ; zygomatic breadth 51 ; nasals, length in middle line 

 32 5, anterior breadth 13"5, posterior breadth 8'D ; interorbital 

 breadth (ignoring the very deep supraorbital notches) 225 ; 

 breadth across postorbital processes 37 "5 ; intertemporal 

 breadth 17'5 ; least breadth of brain-case above meatus 30; 

 palate length 41 ; diastema (to front of p^) 25 ; palatal 

 loramina 6'5 ; length of tooth-series, excluding//, 17. 



Hah. Verkiansk Mountains, Yakutsk, N.E. Siberia. Alti- 

 tude 3000 feet. 



Type. Female. B.M. no. 2. 4. 26. 1. Collected and 

 presented by Talbot Clifton, Esq. 



" Killed in winter while sleeping." 



This marmot is readily recognizable by its small size, 

 which is conspicuously less tlian in A. camtsclviticns and 

 decidedly less than in the A. sihiricus of Transbaikalia and 

 Amurland. 



