[Front the Proceedings of the Zoological Society of London, 

 May 5, 1874.] 



Kemarks on the Grey-capped Gulls and on the Species 

 with which they have been confounded. By Howard 

 Saunders, F.Z.S. 



In anticipation of a Monograph of the Laridae, upon which I 

 have for some time been engaged, I offer a few remarks with the 

 object of clearing up the confusion which exists respecting the 

 Grey-capped Gulls for which Bonaparte formed the subgenus Cir- 

 rhocephalus (Naumannia, 1854, Heft iv. p. 213). 



There are two closely allied species, which during the breeding- 

 season, and, as I believe, throughout a considerable portion of the 

 year, bear a hood of a pale French grey, slightly darker at the 

 margins, round the nape and throat, viz. : — 



Larits ph^ocephalus, Sw. B, W. Afr. ii. p. 245, pi. 29 

 (originally written L. poiocephalus), a native of West Africa and the 

 interior up to Lake Ngami ; and 



Larus cirrhocephalus, Vieillot, N. D. xxi. p. 500 ; GaL Ois. 

 ii. p. 223, pi. 289 ; the Gaviota cenicienta of Azara, found in Brazil 

 and the States of La Plata. 



In their general appearance these Gulls closely resemble each 

 other ; and both Blasius and Schlegel have considered them to be 



[1] 



