732 



Arvicola amphihius hkta Miller. 



1832. Arvicola ater Macgillivray, Mem. Wenierian Soc. Nat. Hist, vi, 

 p. 429. Not Hypudmis terrestris ^ atcr Billberg, 1827. 



1910. Arvicola amphihi^is reta IMiller, Proc. Biol. Soc. Washington, xxiii, 

 p. 19, March 23, 1910 (substitute for ater). 



1910. Arvicola ampliibius rcta Trouessart, Faunc Mamm. d'Europo, p. x. 



Tjipc locality. — Aberdeen, Scotland. 



Geographical distribution. — Scotland, except southern portion ; 

 limits of distribution not known. 



Diagnosis. — Size less than in A. amphihius amphihius (hind 

 foot usually 30 to 32 mm., condylobasal length of skull usually 

 less than 42 mm.) ; normal colour darker than in the typical 

 race, the black usually in excess on upper parts ; melanism 

 frequent. 



Measurements. — Adult male from Glenfeshire Forest, Inverness : 

 head and body, 190; tail, 125; hind foot, 32; ear, 16. Adult 

 female from Windygates, Fife: head and body, 194-5 ; tail, 109 ; 

 hind foot, 30-5; ear, 14*5. For cranial measurements see 

 Table, p. 736. 



Specimens examined. — Twelve, from the following localities in Scot- 

 land : — Elgin, 1 ; Monar Forest, Ross, 1 ; Crieff, Perthshire, 1 ; Glenfeshire 

 Forest, Inverness, 1 ; Cortachy, Forfar, 3 (B.M. and Wilson) ; Windygates, 

 Fife, 5 (B.M. and Edinburgh). 



ARVICOLA SAPIDUS Miller. 

 (Synonymy under subspecies.) 



Geographical distribution. — Iberian Peninsula and southern 

 France east nearly to the Italian border ; northern limit of 

 range not known.* 



Diagnosis. — Like Arvicola amphibius in general size and in 

 form of skull ; nasal bones much widened anteriorly, their 

 greatest combined breadth nearly equal to that of rostrum ; 

 habits strictly aquatic, never mole-like. 



Bemarlcs. — This species appears to be more nearly related to 



* An animal of this type occurs at least as far north as Paris (Lataste, 

 Actes Soc. Linn. Bordeaux, xxxviii, p. 37, 1884), but I have had no 

 opportunity to examine specimens. 



