THE ORKNEY GRASS MOUSE 



463 



DIMENSIONS IN MILLIMETRES:— 



* This series may be taken as consisting only of individuals born before the current season. 

 The influence of immature specimens on the average in October, and the general subsequent increase in size 

 W. Shrews, above, p. 92) is shown in the following table, which is also baaed on measurements supplied 

 by Klnnear :— 



9th to 14th Oct. 7th Nov. 



(12) (16) 



106 (female) 126 (female) 



9S-8 102-6 



83-6 (female) 92 (female) 



Iteus. 

 Maximum 



Approximate average 

 Minimum 



17th Nov. 

 (8) 

 126 (male) 

 106-6 

 94 (female) 



Dec. 1906. 



(9) 



120 (female) 



109-6 



100 (female) 



