232 



MIC'ROTIN^ 



Ttjpe locality. — Skomer Island, off the coast of Pembrokeshire, 

 Wales. 



Range. — Skomer Island. 



Characters. — Distinguished from E. glareolus by its larger 

 size (hind-foot 17-19 mm.; condylo-basal length of skull 

 24-8-25-8 mm.); exceptionally light and bright dorsal colour, 

 sharply contrasted bufiy-white under surface, and by its large 

 massive skull and complex m^. 



In late winter or spring pelage the mantle is broad, encroaching 

 considerably on the paler sides; its general colour is between 

 " orange rufous," bright " cinnamon rufous," and " madder 

 brown." On the face, sides of head, and flanks the bright rufous 

 tints are less conspicuous, running through light " hazel " or 

 " vinaceous cinnamon " to a dull " greyish-buff." Rump and 

 upper surface of the sharj)ly bicoloured tail are " mummy brown." 



Fig. 79. — Evolomij.f skotnerensis Barrett-Hamilton. 

 a. Right upper, b. left lower molars (crown views). 



Under surface of body and tail, with the legs and feet, are whitish, 

 with a very perceptible wash of yellowish on the belly. Summer 

 pelage unknown. 



Skull large, as in E. nageri and related forms ; differing in its 

 great relative depth, short, broad, rather strongly ridged and 

 angular braincase, conspicuous mastoid region, and unusually 

 elongate, centrally contracted almost spatulate nasals, which are 

 decidedly longer than the diastema. Post-orbital processes of 

 squamosals small, but unusually well defined, sending well- 

 developed ridges backwards and upwards nearly to the anterior 

 edges of the parietals. Rostrum and incisive foramina normal. 

 Zygomata rather abruptly expanded anteriorly as in E. n. 

 norvegicus . Auditory buUas relatively large. 



Cheek-teeth like those of E. nageri ; m^ normally with a third 

 inner infold. 



For external and cranial measurements, see tables at end of 

 Volume. 



