LARINiE. LARUS. 
247 
305. Larus glaucus. Glaucous Gull. 
Bill two inches and three-fonrtlis along the ridge, which is 
moderately decurved toward the end, ten- twelfths high at the 
angle, which is prominent ; tarsus three inches long ; wings 
about an inch shorter than the tail ; total length from twenty- 
six to thirty-two inches. In winter, the bill wine-yellow, the 
lower mandible with an orpiment-red patch toward the end ; 
the margins of the eyelids straw-yellow ; the feet flesh-co- 
loured ; the back and wings light bluish-grey ; the quills all 
white at the end ; the head and neck white, streaked with 
very pale brown ; all the other parts pure white. In summer, 
the bill gamboge-yellow, the patch on the lower mandible 
carmine, as are the edges of the eyelids ; the head and neck 
pure white; the other parts as in winter. Young with the 
bill brownish-black toward the end, at the base greyish-yel- 
low, the feet flesh-coloured ; the general ground-colour of the 
plumage pale yellowish-grey ; the head and neck longitudi- 
nally streaked with very pale brown ; the upper parts with 
transverse irregular bands, the lower confusedly mottled and 
barred with pale brown and yellowish-white ; the quills 
greyish-white, irregularly marked with pale brown ; the tail 
pale grey, spotted and barred with pale brown. 
Male, 30, 62, 19J, 2f, 3, 2^, T 5 ? . Female, 28, 60. 
In summer dispersed over the arctic seas, in winter advanc- 
ing into the temperate regions. Dr Lawrence Edmondston 
first introduced it to notice as a British bird, having obtained 
young individuals in Shetland in 1809, 1814, and up to 1821, 
when he proposed naming it Larus islandicus. In March 
1821, he described an adult bird. I have seen it in the Heb- 
rides and the Frith of Forth, and it has been observed on va- 
rious parts of the coast of England. It has not been found 
breeding with us. The eggs are broadly oval, pale yellowish- 
grey, dotted and spotted with dark brown, and blotched with 
pale purplish-grey. 
Burgomaster. Iceland Gull. 
Larus glaucus, Brunnich, Gmelin, Latham % — Larus glau- 
cus, Tern. Man. d’Ornith. ii. 757. — Iceland Gull, Edmond- 
ston, Mem. Wern. Soc. iv. 176, 182. — Larus glacialis, Mac- 
Gillivray, Mem. Wern. Soc. v. 270. — Larus glaucus, Glaucous 
Gull, Macgillivray, Brit. Birds, v. 
306. Larus leucopterus. White-winged Gull. 
Bill nearly two inches along the ridge, which is moderately 
decurved toward the end, eight-t vvelfths high at the angle, 
which is little prominent ; tarsus two inches and a half long ; 
