MR, M. A. C. HINTON ON HEBRIDEAN MAMMALS. 831 



Eight, Jura. Dimensions : — 



Head & Hind 



body. Tail. foot. Ear. 



No. 109, male, subad., 15 May 1912. 115 30 19 13 



118, „ ., 16 „ „ 118 31 19 12 



116, „ ., 17 „ ., 115 32 20 11-5 



114, female, ., 16 „ „ 120 34 19 12 



115, „ „ „ „ „ 115 32 19 12 



117, „ ., 17 „ „ 110 30 18 12 



119, „ adult, „ „ ., 125 35 19 12 

 124, „ subad., 18 „ „ 115 32 19 12 



For cranial measurements see Table at p. 834. 



M. agrestis exsul Miller, of which, in addition to the material 

 in the British Museum, we have examined several specimens 

 from North and South Uist, kindly lent by Mr. Eagle Clarke, 

 of the Royal Scottish Museum, Edinburgh, is a thick-coated form 

 with light upper side and flanks, and under side heavily Avashed 

 with buff. The fur of the back in winter reaches a length of 

 about 12 mm., including the light tips of abou.t 2-3 mm. ; the 

 longer hairs reach about 1 5 mm. We are not able to distinguish 

 the specimens from Mull, Arran, Gigha, and Jura from this sub- 

 species. Those from Mull are practically quite typical. 



The following Table shows the character of the anterior upper 

 cheek-tooth in the skulls examined : — 



Mull. Aeean. Gigha. Jura. 

 4th inner angle quite absent ... - ... 1 1 



„ represented by microscopic 1 ^ . _ , , -, ^ 



" ^ ,• -^ ^ 2 luv. 5 1 4 12 



vestige J >• 



,, small but distinct 1 4 ... 3 8 



Specimens examined 3 9 1 8 21 



Some features of the skull are discussed below in connection 

 Avith the form living in Islay. 



MiCROTUS AGRESTIS MACGILLIVRAII. (Text-fig. 138 B.) 



Abstract P. Z. S. 1913, p. 18 (April 15). 

 Fourteen, Islay. 



No. 78, male, subad., 26 April 1912. 

 79, „ juv., 



88, „ adult, 30 „ 



89, ,, subad., ,, ,, ,, 



90, „ „ 2 May „ 

 102, „ adult, 8 „ 



