Capt. SABINE’S Memoir on the Birds of Greenland, $c. 555 
various parts; buta young male which was killed in June exactly 
resembled the female in colour, though much larger in size. A 
specimen of a young male, which I obtained in June, had no ap- 
pearance of change from the brown plumage, and certainly was 
not a bird of that year; I have therefore formed an opinion on 
this point different from that of Brünnich. The trachea of the 
male is uniform in size, rather compressed; the tympanum is small 
and flatly globose ; the branchiz are of different sizes, the larger 
one being dilated considerably in the centre. 
. 98. Anas Gracrazis. Long-tailed Duck. 
A. Glacialis. Gmel. i. 599. Lath. Ind. Orn. ii. 864. Temm. 558.—Anas Hyemalis. 
Fabr. 71. Müll. no. 123. Faun. Suec. 44 & A7. no. 133 (female). Brün. nos.75, 
76, 77, 78, & 79.—Long-tailed Duck. Lath. Syn. vi. 528 (male). & 599 (female). 
Br. Zool. ii. 968. Arct. Zool. ii. 566. Mont. Dict. Supp. & App. Wil. Am. 
Orn. viii. 93 (male). & 96 (female). 
~ IMMATURE. Anas Glacialis, var. y. Lath. Ind. Orn. ii. 865 (female).—Anas 
Hyemalis. Gmel. i. 520.—Long-tailed Duck. Arct. Zool. ii. 566. & App. 76. —— 
. As the Long-tailed Duck only winters in Europe, returning to 
the arctic regions in the summer, the state of its plumage at the 
time we were in Baffin’s Day is interesting. I obtained a speci- 
men of a mature male on the 30th of June. Its winter dress has 
been detailed by several of the authors referred to, but I believe 
a description of its summer plumage will be new. "The whole 
under part of the neck and the breast is black, the appearance of 
the black spot so conspicuous in winter being removed by the 
general diffusion of the dark feathers; the sides of the head and 
a little beyond the eye are a brownish white; round the eye 
are some white feathers; from the bill a black line runs on the 
top of the head to the crown, which is black; the back of the 
neck is chiefly black, but at a small distance below the crown a 
few white feathers are intermingled with the black ones across 
VOL. XII. Ac the 
