106 W. T. Blauford— On the Voles (Arvicola) of the [No. 2, 



nent than the outer. The longitudinal lobe forming the posterior portion 

 or* the tooth behind the third internal angle is of small length, scarcely 

 one fourth of the tooth ; there are two rudimentary external and one 

 internal angle on the lobe that are not counted. The spaces are not very 

 different from those in A. roylei, although one more is counted ; the first 

 is bounded by the first internal and first two external angles ; the second 

 corresponds to the second internal angle ; the third, which is small, to the 

 third external angle, whilst the fourth is iucluded by the third internal 

 angle and the posterior lobe. 



On the first lower molar there is a rudimentary anterior external angle 

 that has not been counted, the first internal angle is much smaller than the 

 others, and the first external somewhat less prominent. The first and 

 second spaces, the latter corresponding to the second inner angle, are not 

 separated. In the third molar the second space is almost double, the two 

 angles not being quite opposite, and it is a question whether this tooth 

 should be considered as having 3 spaces or 4. 



Interparietal with the hinder border almost straight ; each of the 

 lateral margins forms an ogee curve, concave anteriorly, convex behind, and 

 meeting the posterior margin at an angle rather less than a right ancle . 

 The lateral angles are not produced ; the anterior angle projects very slight- 

 ly forward. 



Dr. J. Scully has done me the honour of naming this Vole after me. 

 It is found commonly on the mountains around Gilgit at an elevation of 

 9000 to 10,000 feet. It is closely allied in the structure of the teeth to 

 A. roylei, but differs widely in external characters, the tail and ears beino- 

 much longer and the coloration quite different. 



This species, in which the posterior lobe of the last upper molar is less 

 developed than in the other four forms of the section, shows a passage to 

 Baludicola. 



Section II. Paludicola. 



The first lower molar with normally 7 spaces, 4 or 5 external and 5 

 internal angles ; the first upper molar with 5 spaces, 3 inner and 3 outer 

 angles ; the second with 4 spaces, 5 outer and 2 inner angles ; the third 

 not terminating in an elongate lobe. 



6. Arvicola blythi. (Teeth, Plate II, fig. B.) 

 Phaiomys leucurus, Blyth, J. A. S. B., 1863, XXXII, p. 89 ; Theobald, 

 J. A. S. B., 1862, XXXI, p. 519 ; Stollczka, J. A. S. B., 1865, 

 XXXIV, p. 110. Nee Arvicola leucurus, Get-be (1852) ; nee idem, 

 Severtzoff (1873). 



