THE IYOET GULL. 
83 
first five quills are black at the end, the first on its outer web also, the fifth 
with a small white tip, the tips of all the other quills more or less white. 
Length to end of tail 18 inches, to end of wings 20, to end of claws 17 ; 
extent of wings 86 i ; wing from flexure 12 ; tail 7 bill along the back 1 £, 
along the edge of lower mandible 2 / T ; tarsus lW; middle toe 14, its claw 
,-V Weight II lbs. 
Young bird in January. 
Bill and feet black. Edges of eyelids and iris as in the adult. The hind 
head and neck are bluish-grey, and before the eye there is a semi-lunar 
blackish mark, the tips of the auriculars also dark grey. Forehead, sides 
of the head, throat, and lower parts, white, as is the rump. Tail white, 
with a broad terminal band of black, the outer feather having only a spot 
on the inner web. The mantle is bluish-grey, but a broad band of black 
crosses the lower part of the hind neck, and the larger wing-coverts are of 
the same colour towards the end. The primary quills are black, more or 
less margined with white internally. 
Length to end of tail 17 inches, to end of wings 19, to end of claws 17 ; 
extent of wings 86 / 2 . Weight 141 oz. 
THE IVORY GULL. 
Larus eburneus, Gmel. 
PLATE CCCOXLV. — Adtot am> Young, 
Having ascertained that this beautiful species visits the southern coast of 
Labrador and Newfoundland every winter, I have thought it probable that 
it occasionally extends its rambles as far as our eastern shores, and therefore 
determined to include it in my Illustrations. The figures in the plate were 
taken from two specimens procured by Captain James Clark Ross, one of 
which was an adult male, the other a young bird in its second year. Captain 
Sabine says that the Ivory Gulls are attracted in considerable numbers by 
whale blubber, are therefore usually found in company with the Procellaria 
glacialis, and are easily killed, being by no means shy. Dr. Richardson 
informs us that they were observed breeding in great numbers on the high 
perforated cliffs which form the extremity of Cape Parry, in latitude 70°. 
Vol. VIII. — 5 
