76 
Allen’s naturalist’s library 
only a foot of lyhich is projecting above water. In Sweden 
on a group of large rocky islets in a fresh-water l ike, I never 
found more than one nest on each islet.” 
Eggs. Three in nmnber. Ground-tint of a clay- or olive- 
brown to chocolate, with reddish-brown or black spots and streaks 
distributed fairly over the whole egg, and seldom formino- 
blotches. Sometimes the dark spots show up faintly, and the 
grey underlying ones are almost as distinctly indicated. A.\is 
2'iS-2'45 inches; diam., 1-6-17. ’ 
X. I HE GL.AUCOUS GULL. LARUS HVPER130REU.S. 
Larus hyperboreus, Gunnerus, in Leem’s Beskr. Finn Laun 
p. 283 (1767). ■ 
Larus glaucus, Fabr. ; Macgill. Brit. B. v. p. 557 (1852)- 
Dresser, R Eur. viii. p. 433, p], 605 (1877); B. O. U.’ 
List Brit. B p. 187 (1883) ; Saunders, cd. Yarrell’s Brit. B. 
111. p. 636 (1884); Seebohm, Hist. Brit. B. iii. p. 330 
(1885); Saundm-.s, Man. Brit. B. p. 663 (1889); Lilfoi'd, 
r°: ■^’'vii. (1893-94); Saunders, 
Cat. B. Brit. Mus. xxv. p. 289 (1896). 
{Phu CIT.) 
Adult Male. — General colour above very pale pcarly-grey, the 
wing-coverts like the back ; the marginal-coverts round' the 
bend of the wing white; bastard-wing and primary-coverts 
grey; primaries pearly-grey, with white shafts, gradually 
becoming white at the ends; the secondaries and scaiiulars 
broadly tiriped with white; the rump, upper tail-coverts, and tail 
white ; head and neck all round, as well as the whole of the 
under surface of the body, pure white; “ bill yellow, orange-red 
at the ange; taysi and toes light fleshy jiink in life; iris 
yellow; orbital ring, orange” {11. Saunders.) Total length 
25 inches; culmen, 2-75; wing, i8-o; tail, 6-7; tarsus, 2-8. 
Adult Female.— Smaller, often considerably so, according to 
Mr. Saunders who says there is also considerable difference in 
the size ot individuals, irrespective of sex. 
Adult in -W-inter.— Similar to the summer jilumage, but having 
the head and neck streaked with pale ashy-browm 
Young.— Very pale ashy-brown both above and below the 
bases of the feathers whiter, the back and win.^^s mottled with 
