sabine’s gull. 
57 
m the fourth, fifth, and sixth, assimilate to the feather at that 
part, which is white; the whole of the outer webs of the first 
five black, the inner webs with a broad edging of dull white 
to within from one to two inches of the end; in the sixth the 
inner web is dull white, the outer black, excepting for about 
a quarter of an inch from the tip, where it is white, and 
again at about an inch from the end, where a white oval¬ 
shaped spot appears; (the above description is compiled from 
Mr. Thompson’s, of Belfast.) Secondaries, broadly tipped with 
white; tertiaries, grey; greater and lesser under wing coverts, 
white. The tail, less forked than in the full-grown bird, is 
dull white, the tip black; upper and under tail coverts, white 
Legs and toes, black; webs black. 
