MAMMALIA. 



43 



quintam partem totius longitudinis subcequante, pilis fulvescenti-albidis setosis instructs ; 

 dente molario maxillari ultimo angusto, intus angiitis duobus fortioribus antice, nulUs 

 postice, extus quatuor parvulis, duobus antice, ceteris postice, spatio interveniente, munito. 

 Long, a rostro ad basin caudce {in corio dessicato) 4, caudce 1, tarsi 0'7 poll. 



1, Nubra valley, N. of Laddk ; 2. Aktagh, on the upper waters of the Yarkand river. 



General colour bright ferruginous, brown above, pure white beneath. Fur soft, rather 

 woolly, 0*5 to 0*6 inch long on the middle of the back, the basal portion throughout both 

 head and body being dark leaden-grey : this is the case on the back for about three quarters 

 of the length of the hairs ; the remaining quarter is ruf ous-white, tipped with darker rufous, 

 whilst numerous rather longer hairs are dark rufous-brown at the ends. Rather a sharp line 

 divides the rufous of the back from the white belly. Upper part of the head the same colour 

 as the back. Upper whiskers dark -brown ; lower, including the longest, white. Ears small, 

 rounded, hairy, completely concealed by the fur, with rather short bright rufous hair near 

 the margin inside, and covered outside with longer and paler hair. Teet small, the thumb 

 of the fore-foot quite rudimentary and clawless ; remaining claws long, compressed, sharply 

 pointed, but much concealed by the long white hairs, which cover the upper part of the 

 foot ; soles naked ; tarsus hairy below, a few hairs between the pads of the toes. Tail short, 

 apparently about a quarter the length of the body and head together, covered with stiff 

 fulvescent white hair, which extends about half an inch beyond the end. The dimensions 

 are taken from dried skins, and are consequently only approximations ; length of head and 

 body 4 inches ; tail with terminal hairs L|, without hairs 1 ; tarsus and hind-foot to end of 

 claws 07 ; ear from orifice 0 - 35 ; breadth the same. 



The following are the dimensions of a broken skull extracted from the skin : — 



Metre. Inches. 



Length, about '029 1*15 



Do. of nasal bones -0095 0-38 



Breadth of do. behind -002 0-08 



Do. do. in front "003 0-12 



Width between orbits -0035 0-13 



Length of molars of upper jaw ..... - 007 027 



Distance from do. to incisors ...... "0085 034 



Length of lower jaw from condyle to symphysis . . . -018 0'73 



The nasal bones have a slightly concave outer margin, and their posterior termination is 

 not rounded. The incisors are deep yellow in front ; the upper pair having a very shallow- 

 groove down the centre. The anterior molar in the upper jaw consists of five prismatic lobes, 

 and has three salient angles on each side ; the second consists of four prisms, and has three 

 angles outside, two inside ; the third is peculiarly formed : it has two strong salient angles 

 on the inside, and two very weak outside in the anterior portion, which is followed by 

 an elongate process having two 1 slight projecting angles on the outside only, so that altogether 

 this tooth has two strong salient angles inside, and four — all much weaker — outside ; the front 

 inner pair separated from the hinder pair by a deep groove. 



In the lower jaw the anterior molar is much the largest, and the hinder small ; the first 

 has five projections on each side, — the anterior pair very small and blunt ; the second has three 



1 The hindmost is not shewn on the figure, PI. X b, fig. 2, as it is scarcely seen on the crown of the tooth ; it is at the inner 

 hinder extremity, or at the left baud lower termination of the figure, and is blunter than the angle just in front of it. 



