232 RAZOR-BILL AUK. 



and sides of the head, as well as the under parts, 

 are white, the light colour passing over nearly to 

 the occiput, where it is very slightly clouded, and 

 the feathers become gradually purer, the tips for a 



certain space only being dark. A specimen in this 

 state is before us, shot in winter, and showing the 

 breadth of the bill not developed. We possess 

 another, where the breadth of the bill is greater, but 

 the white marking is not complete ; the plumage of 

 the head and neck darker, and with white mixed, 

 as if the adult breeding state was still in progress. 



The next form is a very remarkable one, where 

 the bill, in comparison with the size of the bird, is 



