430 NATATORES. MERGULUS. Rotcne. 
COMMON ROTCHE. 
Menrcutus MELANOLEuCOS, Ray. 
PLATE LXXXI. 
Mergulus melanoleucos, Rati Syn. 125. A.—Steph. Shaw’s Zool. 13. 34. 
pl. 3.—Flem. Br. Anim. 1. 135. No. 216. 
iis Alle, Linn. Syst. 1. 211. 5 —Gumel. Syst. 1. 55 aie Ind. Orn. 2. 
795. Sp. 10. 
Uria minor, Briss. Orn. 6. 73. 2. 
Uria Alle, Temm. Man. d’Ornith. 2. 928.—Faun. Amer. Boreal. 2. 497. 
No. 238. 
Te Petit Guillemot femelle, Buff: Pl. Enl. 917, but not his description. 
Guillemot nain, Temm. Man. d’Orn. 2. 928.—Lesson, Man. d’Orn. 2. 360. 
Der Kleine Alk, Bechst. Naturg. Deut. 4. 732.—Meyer, Tasschenb. Deut. 
2. 443. 
Small Black and White Diver, Wii. (Angl.) 343.— Edwards’ Glean. t. 91. 
Little Auk, Br. Zool. 2. 517. No. 233.—Arct. Zool. 2. 429.—Lath. Syn. 5. 
327. 11.—- Lewin’s Br. Birds, 6. 223.—Mont. Orn. Dict. & Sup.—Bewick’s 
Br. Birds, ed. 1826. pt. 408.— Wils. Amer. Orn. 9. 94. pl. 74. f. 5.—Low’s 
Faun. Orcad. 103. 
Little Guillemot, Faun. Amer. Boreal. 4. 479. No. 238. 
Common Sea Dove, Shaw’s Zool. 13. 34. pl. 3. 
Common Rotche, Flem. Br. Anim. 1. 133. No. 216. 
In the various accounts of voyages in the northern seas, 
this bird is mentioned as of very frequent occurrence, under 
the name of the Rotche ; which appellative I have therefore 
adopted, in imitation of Dr FLemine, as the one by which 
it is most generally known. It extends to very high lati- 
Periodical tudes, and abounds during summer in all the open spots of 
visitant. 
Food. 
Incuba- 
tion, &c. 
water amongst the floes and ice-fields of those desolate re- 
gions; where, however, it meets with a never-failing supply 
of the crustaceous and other small marine animals on which 
it subsists. Around the coasts of Greenland and Spitzber- 
gen it is very numerous during the breeding season, deposit- 
ing its solitary egg, of a pale bluish-green colour, upon the 
ledges of precipitous rocks, from whence it can easily either 
throw itself into the water, or take wing. It is also to be 
found very plentifully during the summer in the arctic seas 
of the American Continent, but migrates in winter to the 
