Diitish Fori)ts of X\n)([{i\x\\\<'. 125 



Tail, Iliiid foot, 



Head without without 



& body. haire. claws. Ear. C.-b. 1. 



Averagre 9o-85 87-82 23-25 1.t2 



No. 18, cf, 31st March, 



1913 102 90 24 10 23S{24-|) 



No. (j, cf j"v., 22ud 



March, l'.)13 .... 77 72 23 lo 

 No. 5, 2 iuv., 21st 



March, 1913 .... 78 Go-.l 22 M 



The males nos. 3, 9, and 18 have tlie ventral sui-racc as in 

 the males from Garryuahiiie ; the pectoral spot becomes 

 gradually larger and the general l)ufFy suffusion more intense 

 in the other specimens, and cnlminates in nos. 12 and 13, 

 in which these fcatiu'cs are quite as Mell developed as in 

 nos. 19 and 21 from Garrynahine. The (eniales have larger 

 pectoral spots than have nos. 3, 9, and 18, but they are by 

 no means so huffy below as nos. 12 and 13. The young 

 s])ecimens (nos. 5 and G) were taken in a covert, and may 

 belong to the same litter ; in view of de Winton's assertion 

 (Harrett-Hamilton, P. Z. S. 1900, p. 404) it is of interest to 

 note that while the male has a coat like the adult, in which 

 the Hanks are ligiit, the under surface silvery, with a bright 

 pectoral spot and a paler median huffy suffusion behind, the 

 female has the flanks still dark, and, though a faint beginning 

 of the huffy stripe can be seen, the under surface is greatly 

 darkened by tlie slaty bases of the hairs. 



Cranial characters. — The condylo-basal length of adult 

 skulls ranges between 22'7 and 25 mm. : the average is more 

 tiian 1 mm. longer than in A. s. sylvaticus of England. The 

 type-skull from Uig, Western Lewis, and the almost topo- 

 typical skulls from Garrynahine differ from s. sylvaticus 

 most strikingly in their relatively much shorter postmolar 

 lengths and smaller bulhe; the zygomatic, iutcrorbital, and 

 cranial breadths are slightly smaller, the brain-case a little 

 deeper ; the nasals are rather longer and distinctly narrower ; 

 the palatal length is slightly greater, the diastema and 

 incisive foramina are distinctly longer, the rostrum nar- 

 rower : the masseteric plate is slightly wider and the molars 

 a little longer. The skulls from Stornoway differ, as will be 

 seen from the table at pp. 120-121, in several respects from 

 those from Western Lewis. In them the zygomatic and 

 cranial widths are considcral)ly greater relatively, the brain- 

 case deeper ; the nasals are slightly longer and distinctly 

 wider ; the diastema and incisive foramina are a little shorter, 

 the rostrum broader ; the masseteric plate is a little w ider and 



