600 LARIDZE. 



An egg of this Gull, in the collection of the Lady of the 

 Honourable Sir Edward Cust, of which I was permitted 

 to have a drawing, measures two inches and a half in 

 length by one inch and three quarters in breadth, of a 

 pale greenish-white colour, with numerous spots and 

 specks of two shades of brown, with others of bluish-grey 

 over the surface generally. 



The Iceland Gull sometimes makes its appearance in 

 winter at the mouth of the Elbe ; it has also been taken in 

 Holland and in Belgium ; the latter circumstance I learn 

 by the publication of a most useful and interesting volume 

 on the vertebrate animals of Belgium, written by M. 

 Edmund de Selys-Longchamps, of Liege, and which has 

 recently been received in this country. 



In the adult Lesser White-winged Gull the bill is small 

 and yellow, the angle of the under mandible red ; the irides 

 straw yellow ; head and neck all round pure white ; back, 

 wings, and all the wing-coverts very pale ash grey ; pri- 

 mary quill-feathers wholly white ; upper tail-coverts and 

 tail-feathers white ; chin, throat, breast, and all the under 

 surface of the body and tail, pure white; legs, flesh- 

 coloured. 



The whole length is twenty-two inches; the pointed 

 ends of the wings, when closed, reach two inches beyond 

 the tail. 



From September to the beginning of April, while in 

 their winter plumage, Faber says, they have grey spots on 

 their head and neck. 



Mr. Mitchell's young bird has the bill pale yellow at the 

 base, the anterior half horny black ; the irides dark brown , 

 head and neck dull white, clouded with pale ash brown ; 

 the back the same colour ; secondaries, tertials, and all the 

 wing-coverts dull white, marked transversely with pale 

 brown angular streaks ; primaries white ; tail-coverts and 



