74 RESIDENTS AND MIGRANTS. 
GUILLEMOT. Uria troile (Linneus). 
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 (Uria 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 Feeroes,’ says, 
“this is certainly but a variety of trodle, for I have 
watched the one pairing with the other, and have seen 
a Ringed 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. Uria grylle (Linneus). 
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. 
