MASKED GULL. 297 



In this species the dark colour of the head does 

 not reach to the occiput, but covers the forehead, 

 region of the eyes and cheeks, and extends down- 

 ward on the throat and fore part of the neck ; the 

 back of the head and neck, under parts and tail, pure 

 white ; the mantle and wings pale grey ; the bill, 

 legs and feet, according to Mr. Yarrell, are brown- 

 ish red. In winter the dark colour of the head is 

 lost, and, according to the author we have quoted, 

 there are a few dusky grey lines on the crown and 

 a small patch of dusky black under the eye, and 

 upon or under the ear-covers. Length fourteen 

 inches and a half. 



Another species, which has not yet been dis- 

 covered in Britain, was drawn and engraved, and 

 stood as 



PLATE XXIII. 



before the mistake was discovered ; it is very closely 

 allied to the last, and is a native of the coasts of 

 Southern Europe ; we have thought it best to allow 

 this to remain and exhibit the distinctions of the pale 

 mantle and pure white quills when contrasted with 



