BONAPARTIAN GULL. 557 



fourteen inches to fifteen inches and a half; wing, from 

 the bend to the end of the longest quill-feather, te^i 

 inches. 



A young bird in its first plumage, killed at the end of 

 August, has the crown of the head, back of the neck, 

 scapulars, and interscapulars greyish-brown, with paler 

 tips ; middle of the wing and tertiaries blackish-brown, 

 the tips lighter ; bastard wing and primary coverts blotched 

 with the same ; throat and upper part of the breast 

 faintly tinged with buff"; the rest of the plumage nearly 

 as in the bird of one year ; bill brownish ; pale at the base 

 beneath ; legs clay-coloured. 



The figures here given are intended to represent in the 

 lower bird the anterior half of an adult bird in the breed- 

 ing plumage; the entire figure placed on the rock is a 

 young bird in the plumage of its first winter. The egg 

 has not been figured or described, as far as I know. 



