SCIENTIFIC RESULTS FROM THE MAMMAL SURVEY. 413 



basal tint varying from a pale grey to slate colour. In specimens 

 with light bases to the ventral hairs, the bellies are sharply con- 

 trasted with the flanks and the line of demarcation, although not a 

 hard one, is regular. In the darkest specimens, the flank and ven- 

 tral colours tend to merge insensibly in each other. The feet are 

 almost constantly of a dirty white colour above. The tail is unicol- 

 oured and dusky, although the precise hue is subject to considerable 

 individual variation. 



Among the great number before me only two specimens deviate 

 considerably from the coloration above described. One from 

 Pashok, Darjiling (B. M. 17.7.9.1, j , is exceptionally dark above 

 and below ; in this, the belly is almost concolor with the flanks, 

 only a few of the more centrally placed ventral hairs having con- 

 spicuous silvery tips. The other from Ghoom, Darjiling (B. M. 

 15.9.1.149, $ ) has a rather distinct black stripe along the spine, 

 chocolate flanks — lacking the yellowish brown tints normally 

 present, and a silvery white belly — the ventral hairs being white to 

 their bases. In a very few specimens the feet are darkened above 

 by a dusky marking. 



The females have a mammary formula of 3-3=12, in one speci- 

 men 4 pectoral mammae were present on one side, the normal 3 on 

 the other. 



The dimensions of the specimens whose skulls were specially 

 examined are : — 



KuMAoN (B. M. serial No. 14.7.10.) : — 



.141 3783 2 , 24 Sept. 1913 170-175-34-21. 6 oz. Lwarkhet, 



6,000'. 



.144 3684$, 7 „ „ 176-179-34-21. 6 oz. Khati, 7,600'. 



.146 4413 c5 , 10 Feb. 1914 161-178-37.5-20 6 „ Lohaghat, 



5,600'. 



.147 4433 cJ , 12 „ „ 171-184-36-21 



Average of 12 :— 168-177-35.7-20.8 



„ % of head and body:— 100-105-21.2-12.4 



SiKKiM (B. M. serial No. 15.9.1.) :— 



175-192-34-23 5 oz. Ghoom, 7,400' 

 171-182-38-22 Gangtok, 6,000' 

 167-162-34-21 4ioz.Ghoom, 7,400' 

 163-167-35-20 5 „ 

 185-195-37-23 Gopaldahra. 

 184-185-34-22 „ 4,720' 



805 2 , 5 July „ 155-148-33-23 



Average of 70 adults :— 160-171-33.9-22.2 



„ % of head and body :— 100-107-21.2-13.9 



