420 NATATORES. URIA.- GUILGEMOT.- 
however, tolerably rapid, being sustained by quickly repeated 
strokes of the pinions. They breed upon the ledges and pre- 
cipitous summits of rocks overhanging the sea, laying one 
large conical egg, broad at one end, and very narrow at the 
other, it being prevented by this form from rolling off the 
shelving place of its deposit. From the backward position 
and confined movement of the legs, their progress on land is 
very limited; and they sit, in an upright position, upon the 
foot and whole length of the tarsus. Their plumage is very 
thick, close-set, and, in the living state, impervious to the ac- 
tion of the water. They are subject to a double moult, and. 
their summer (or nuptial) dress differs in many respects from. 
that of the winter. 
FOOLISH GUILLEMOT. 
Ora Trois, Lath. 
PLATE LXXIX. 
Uria Troile, Lath. Ind. Orn. 2. 796. sp. 1.—Steph. Shaw’s Zool. 12: 
244. pl. 62. f 1—Filem. Br. Anim. 1. 134. sp. 214.—Faun. Amer. Bo- 
real. 2. 477. No. 235. 
Colymbus Troile, Linn. Syst. 1. 220. 2.—Gmel. Syst. 1. 585. 
Uria, Briss. 6. 70. 1. t. 6. f. 1. 
Lomwia Hoieri, Rati Syn. 120. A. 4.— Will. 244. 5. 
Le Guillemot, Buff: Ois, 9. 350.—ZJd. Pl. Enl. 903. 
Guillemot & Capuchon, Temm. Man. d’Orn. 2. 921.—Lesson, Man. d’Orn. 
2. 361. 
Grand Guillemot, Cwv. Reg. Anim. 1. 509. 
Foolish Guillemot, Penn. Br. Zool. 2. 519. No. 234.—Arct. Zool. 2. 
436.—Albin’s Birds, 1. pl. 84.—Edwards’ Glean. 359. f. 1.—Will. 
(Angl.) 324.—Lath. Syn. 6. 329. 1.—Id. Sup. 265.—Lewin’s Br. Birds, 
6. pl. 220.—Mont. Ornith. Dict. and Sup.—Bewick’s Br. Birds, ed. 
1826, 2. p. t. 168.— Shaw’s Zool. 12. 246. pl. 63. 
Uria minor, Sieph. Shaw’s Zool. 12. 246. pl. 63. 
Colymbus minor, Gme/. Syst. 1. 585. 
Der Dumme Lumme, Bechst. Naturg. Deut. 4. 574. 
ongand | ¢ 'Proilumme, Meyer, 'Tasschenb. Deut. 2. 445. 
plumage. Lesser Guillemot, Penn. Br. Zool. 2. 520. No. 235. pl. 83.—Arct.* Zool: 
Sup. 69.—Lath. Syn. 6. 332. 2.—Mont. Ornith. Dict. and Sup.— 
Bewick’s Br. Birds, ed. 1826, 2. p. t. 168.—Shaw’s Zool. 12. 246. pl. 63. 
Provincrat—Guillem, Sea-Hen, Scout; Willock, Skiddaw, Murre, Lary: 
Strany,.Tinkershire, Marrot, Scuttock, Murse, Lungy. 
