282 PROCEEDINGS OF THE ACADEMY OF [1899. 



altitudes of 14,000 feet and 16,000 feet. The following are the 

 exact localities represented : 



Tsokr Chumo (lake), 15,000 feet. 



Kupchen, Rupshu, 15,000 feet. 



Ooti, Rupshu, 15,500 feet. 



Rupshu, 16,000 feet. 



Hanle district, 16,000 feet. 



Banks of Hanle river, 15,000 feet. 



Chibra, Hanle river, 14,000 feet. 



West side of Pognor lake, 16,000 feet. 



Above Tsomoriri lake, 16,000 feet. 



Karzok, Tsomoriri, altitude not stated. 



Colo I'. — The series of skins shows no considerable variation in 

 color. In summer pelage the back is light woodbrown, strongly 

 tinged with yellowish, and very faintly darkened by an even 

 sprinkling of long blackish haii's, which in many specimens are 

 more noticeable on neck and region behind shoulders than else- 

 where. Sides clear buff; belly like sides, but paler and irregularly 

 clouded by the appearance on the surface of the dark underfur. 

 Tail pale buff, slightly paler below. Feet dirty white. :; The autumn 

 coat, v/hich is beginning to appear in specimens taken late in 

 August and early in September, is slightly less yellow. Half- 

 grown young are duller and l)rowner than the adults. These imma- 

 ture specimens show a more strongly contrasted (though actually 

 duller) buffy lateral area. 



Feet. — Both palms and soles are 5-tuberculate. On the soles a 

 rudimentary sixth tubercle is distinguishable in two quarter-grown 

 individuals preserved in formalin. 



Mammce. — On the label of an adult female taken above Tso- 

 moriri, July 31, 1897, Dr. Abbott records the number of mammai 

 as four pectoral and four inguinal. I find a like number in each 

 of two females preserved in formalin. 



Skull. — The series of fifteen perfect adult skulls shows the slight 

 range of individual variation usually met with in species of 3Ii- 

 crotus. The most variable characters appear to be the form of the 

 interparietal, the extent of the constriction near the middle of the 

 nasals, the extent of the forward projection of the upper incisors, 

 and the size of the audital bullae. The development of the audital 



