GULL. NATATORES. LARUS. 497 
IVORY GULL. 
Larus rpurneus, Gmel. 
PLATE XCIV.* 
Larus eburneus, Gmel. Syst. 1. 596. —Lath. Ind. Orn. 2. 816. sp. 10.—£d- 
monst. in Mem. of Wern. Soc. 4. 561.—Sabine in Trans. Linn. Soc. 12. 
548.—Steph. Shaw’s Zool. 13. 195. 
Larus candidus, Flem. Br. Anim. 1. 142. No. 3. 
La Mouette Blanche, Buff: Ois. 8. 422.—Td. Pl. Enl. 994. 
Mouette Blanche, ou Senateur, Temm. Man. d’Ornith. 2. 769. 
Senator, Ray’s Syn. 126. 1. 
Ivory Gull, Penn. Arct. Zool. 2. 457.—Lath. Syn. 6. 377.—Shaw’s Zool 
13. 195.—Bewick’s Br. Birds, ed. 1826, p. t. 214. 
THE immaculate white which distinguishes the adult plu- Rare visi- 
mage of the Ivory Gull, renders it one of the most beautiful | 
of the genus. In this country it is only known as a rare vi- 
sitant, and the first authenticated instance of its capture is 
that mentioned by Laurence Epmonston, Esq. as publish- 
ed in the fourth volume of the Memoirs of the Wernerian 
Society, where the bird (which appears to have been one of 
the second year) is stated to have been shot in Balta Sound, 
Shetland, in December 1822. Since that time it has been 
killed, also in an immature state, in the Frith of Clyde. It 
is a native of the northern Arctic Regions, and is found in 
very high latitudes, being common in Greenland and Spitz- 
bergen, where it breeds upon the rocks and cliffs that over- 
hang the sea. Captain SaBine states it to be abundant in 
Baffin’s Bay, and Dr Ricuarpson also mentions it as fre- 
quenting Davis's Straits, and that it was discovered breeding 
in great numbers on the high perforated cliffs that form the 
extremity of Cape Parry in latitude 70°. Except during the 
breeding season, it is generally seen out at sea, often in com- 
pany with the Fulmar, and is observed to be, like it, a con- ~ 
stant attendant upon the whale-fishery, greedily feeding up- Feed. 
on the blubber, which, with other carrion and animal matter, 
constitutes its food. It is stated to possess little of that shy 
VOL. II. ria 
