74 RESIDENTS AND MIGRANTS. 



GUILLEMOT. Una troile (Linnaeus). 



May be seen in the tideway of the open sea all round 

 the coast at any time of year but most conspicuous 

 during the breeding-season, when assembling by hun- 

 dreds on the cliffs, 



The so-called Ringed Guillemot ( TJria ringvia, leuc- 

 ophthalmus, or lacrymans, as it has been variously 

 styled) can scarcely be regarded as any thing more than 

 a variety of the common species, from which it differs 

 only in having a white line encircling and extending 

 behind the eye*. 



Miiller, in his ' Bird-fauna of the Fseroes,' says, 

 " this is certainly but a variety of troile^ for I have 

 watched the one pairing with the other, and have seen 

 a Kinged Guillemot feeding a young one which a 

 Common Guillemot had under her wing." Mr. Harvie 

 Brown informs me that he has witnessed a similar 

 thing in the Hebrides f- 



BLACK GUILLEMOT. Una grylle (Linnaeus). 



Resident in the Hebrides, on some parts of the 

 Scottish coast, and in Ireland. It is also found upon 

 the Welsh coast, but is rare in the east and south 

 of England. 



* An analogous variation is sometimes met with in the Razor- 

 bill ('The Field/ March 23, 1872). 



t See also Gray, ' Birds of the West of Scotland,' p. 424. 



