362 Mr. G. E. H. Barrett-Hamilton on 



Europe and M. m. canescens of Persia; and Mustela foina 

 mediterrajica *, occurring in South Spain and Asia Minor, 

 and at Kandahar. 



Secondly, it is curious to find that, whereas in the case 

 of the weasel f there is a tendency for the white belly of 

 northern si)ecimens to become yellow in the south, in the 

 hedgehog the process would seem to be reversed ; but it is 

 just possible that we may find a parallel in the light Eliomys 

 pallidus of Sicily, in Mustela foina mediterranean in Microtus 

 Musignani illyricus, and in Meles meles mediterraneus. 



As regards cranial differences, I find that I can distinguish 

 between, on the one hand, the similarly coloured Roumanian 

 and the true concolor, and there are also characters whereby 

 the hedgehogs of different parts of Europe may be separated, 

 as, for instance, the British and the Italian. It is noticeable 

 that the sagittal crest may be developed in quite young speci- 

 mens, as in one from South Germany, in which the teeth of 

 the permanent dentition are only just making their appear- 

 ance. The size of certain of the teeth is subject to some varia- 

 tion in different individuals. This is, I think, especially the 

 case as regards '°°- ^, a tooth the size and position of which 

 is relied upon in part by my friend Mr. W. E, de Winton J 

 as a distinguishing characteristic between E.algiruSy Duvernoy, 

 and E. europceus. This tooth is usually far larger in the 

 latter than in the former species ; but I find it quite small in 

 some individuals, as in a (perhaps not quite) adult from 

 Cardiff, and intermediate in size in a large male from Hadding- 

 tonshire, Scotland. The shape of the frontal process of the 

 premaxilla seems to be a quite reliable subspecific character. 



The following subspecies are recognizable : — 



(1) Erinaceus europceus occidentalis, subsp. n. 



Type from Haddingtonshire, Scotland ; presented by 

 Mr. W. Eagle Clarke (for particulars see below). 



Distinguishing characteristics. Colour of underside a 

 mixture of dirty white and dirty brown without definable 

 pattern. Spines with at least three bands as above described. 

 Skull with conspicuous frontal processes to the premaxillae, 

 with a blunt or nearly square posterior termination, and seldom 

 showing a sharply defined point or angle ; these processes 

 usually extend backward for more than half the length of 

 the nasals. 



Dimensions (in millim.) of four selected specimens : — 



* Barrett-Hamiltou, op. cit. June ]898, pp. 441-2. 



t Id. op. cit. Jan. 190U, p. 41. 



j ''On a Collection of Mamiuala from Morocco," P.Z. S, 1897, pp. 956-6. 



