•26 



43. Mus musculus, Linnaeus. 



House-Mouse. 



Gael., Luch. 



Universally distributed wherever tliere are human habitations. 

 Baikie and Heddle state, however, that, like the last species, Mice 

 are absent from the islands of Enhallow and Damsay (Hist. Nat. 

 Ore., p. 15). They are abundant in the Outer Hebrides. 



• 44. Mus sylvaticus, Linnaeus. 



Wood-Mouse, Long-tailed Field-Mouse. 



A common species throughout the whole of the mainland, in 

 Orkney (Hist. Nat. Ore, p. 14), and in most, if not all, of the Inner 

 Islands; but I have not been able to obtain any positive evidence 

 of its existence in the Outer Hebrides or in Shetland. 



45. Mus minutus, Pallas. 



Harvest Mouse. 



Appears to be generally but locally distributed in the eastern 

 Lowland counties, but to be absent in the west, although it is not 

 rare in the north-west of England. W. Macgillivray has recorded it 

 from Midlothian, Fifeshire, and Aberdeenshire (Nat. Libr., xxn., 

 p. 257), it is included in a list of the animals of Alloa, and its size 

 and weight correctly noted (Neiv Stat. Ace. Clackmannansh., p. 9), 

 and Mr. B,. Gray informs me that he caught one in Kincardineshire 

 in 1869. This eastern distribution in Scotland of a comparatively 

 southern form is interesting as analogous to the range of certain 

 birds, as commented on by Messrs. Gray and Anderson in their 

 " Birds of Ayr and Wigtown " (p. 4). 



[What is the " Button-Mouse," reported to Baikie and Heddle 

 to exist in Orkney, only two inches long, and " frequently found 

 asleep, rolled up in the shape of a ball" (Hist. Nat. Ore., p. 15, 

 foot-note)]] 



40. Akvicola agrestis, l)e Selys. 



Common Field-Vole, Short-tailed Field-Mouse. 



Scot., Water-Mouse. 



Gael., Luch-fheior (lit., grass-mouse.) 



Common throughout the mainland, in the Inner Islands, and in 

 Orkney (Hist. Nat. Ore., p. 16), but not found in Shetland. In the 

 Outer Hebrides it was not met with by W. Macgillivray, but was 



