62 R. COLLETT. MYODES LEMMUS. [No. 3. 1895] 
During the shedding of the coat in August, most of the long, 
yellow, winter hairs fall off the old lemmings, and the real fur 
which remains, gives the hinder portions of the back å more 
brownish-gray appearance than they possess during the winter. 
On the other hand, the young ones are, invariably, remark- 
ably alike in their markings. 
Notwithstanding the enormous numbers in which they may 
appear, varieties are, comparatively, extremely rare, and of lat- 
ter years, I only know of two such aberrations. An albino was 
caught at Mortensnæs, on the Varanger Fjord (Finmarken), in 
October, 1876, and is breserved in the Museum at Upsala. This 
specimen which, through the kindness of Professor Tullberg, I 
have had an opportunity of examining, is of å pale yellow colour 
over all, with whitish snout and forehead, the dark patch on 
the back being faintly and indistinctly visible under the pale 
yellow hairs. 
Qne individual having a whitish head (while the other mark- 
ings were normal), was caught at Os in Österdal on the 20th 
October, 1890 (preserved in the Museum at Christiania), 
Christiania, 15th February, 1895. 

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