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THE SCOTTISH NATURALIST 



being of a bright buff and clearly separated from the upper 

 surface by a well-marked line of demarcation. The hind 

 foot is broader and more robust than in Jlfus musculus. 



The nature of the fur of these two St Kilda mice is 

 different. That of hirtensis is long, soft, and fluffy, like 

 that of a Vole ; while that of muralis is hair-like and short. 



In the following tabulation of measurements only 

 examples with Head and Body over 90 millimetres have 

 been included, the rest of the specimens being immature. 



