Arvicola/rom Northern India. 323 



The molar pattern is as follows : — 



Upper I. 5 spaces, 3 external and 3 internal angles. 

 „ IT. 4 „ 3 ,, 2 „ „ 



„ in. 3 „ 4 „ 2 „ „ 



Lower 1. 7 „ 4 „ 4 „ „ 



» II- 5 » 3 „ o „ „ 



„ HI- 4 „ 3 „ 3 „ „ 



The first two spaces of the first and the two middle ones of 

 the last lower molars are not distinctly separated. 



The third upper molar has two strong salient angles on the 

 front part of the inner side ; and then follows the straight 

 inner edge of the long posterior lobe. On the outer side there 

 are anteriorly two very small angles, succeeded by a deep 

 emargination, corresponding to the second of the inner angles ; 

 and then follow the two rounded outer corners of the poste- 

 rior lobe, thus forming the third and fourth outer angles. 

 The spaces enclosed are : — first, an irregularly triangular one 

 between the two small external and one large interior angles ; 

 secondly, a small nearly circular one, contained in the second 

 large internal angle; and, lastly, a long rectangular one, 

 situated in the posterior lobe. 



Arvicola Stracheyi has thus this tooth similarly formed to 

 that of A. Stoliczkana) but the terminal lobe is much longer, 

 being quite half the length of the whole tooth, and the two 

 small anterior outer angles are just equal to one another, 

 while in that species the first projects considerably beyond the 

 second. The coloration and proportions of these two species 

 are, moreover, very different. 



The following are the measurements of the type, which is a 

 skin in rather bad condition, so that they must be regarded 

 as only approximate : — 



inches. 



Length of head and body 3'7 



Length of tail-vertebra? 0*7 



Length of hind foot, without claws OG5 



Skull : 



From end of nasals to anterior angle of interparietal 0-84 



Extreme breadth 0'59 



Breadth between orbits 0"15 



Breadth of brain-case 0*50 



Length of nasals - 32 



Length of upper molar series - 2o 



From upper molar series to incisors 030 



Mr. Blanford has given me to understand that he intends 

 shortly to publish descriptions, with figures of the teeth, of 

 all the known North-Indian Voles ; and so I have not thought 

 it necessary to have a drawing made of the teeth of this 

 species, as they will be figured in his paper. 



