6 R. COLLETT. [No. 1. 

In all plastic characters the specimen agrees with U. grylle. 
The size is exactly the same; out of 10 specimens (all from 
Norway) of the last-named species which I have measured in å 
fresh condition, between the years 1872 and 1899, the total 

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Uria grylle, $ var. Christiansund, Nov. 16th, 1894. 
length of four has been greater, of six, less than this spe- 
cimen.) 
1) The average size of these 10 specimens was as follows: Total length, 
3498 mm. Wing, 1638 mm. Tail, 51.2 mm. 
One of the specimens was unusually large, another unusually 
small. viz.: 
