296 
MASKED GUIX. 
distributed, but we have no detailed account of its 
habits there, and we have few memoranda of its 
extra-European range. The Zoological Society have 
received it from Erzcroom. * 
The next three species of black-headed gulls are 
only accidentally' found in Britain, and are now in- 
troduced that attention may be attracted ; one of 
them may' be found in some locality in the Orkneys 
or the northern islands of Scotland ; they are easily 
confounded with the last by an inattentive observer. 
The Masked Gull, Lards capistratds — This 
appears to be everywhere a rare species, and the 
examples of it which have occurred in Britain have 
been few, amounting to five or six in number. We 
have not a specimen before us, and borrow generally 
the British information regarding it. The first spe- 
cimens were those in the collection of Mr. Bullock, 
sold to Dr. Leach at the dispersion of his collec- 
tion, and said to be token with the young and 
eggs in Orkney; and a third specimen has since 
that time been procured from Shetland. It has oc- 
curred in Wales, and to Mr. Thompson in Ireland. 
On the Continent a few instances are also recorded, 
but we have no information of its breeding places. 
It may probably be a northern species ; Temminck 
states that it is found in Baffin's Bay and Davis’ 
Straits. 
* Yarrell. 
