. The birds of America : from drawings made in the United States and their territories . ength, and varies in diameter from 8 to 6 rectum is 3^ inches long, the cloaca extremely large, forming a cavityabout 3 inches in diameter. The cceca are If inches long, cylindrical,rounded at the extremity; one of them 7 lines, the other 9 lines, in trachea, when moderately extended, measures 13|- inches in length,inconsiderably depressed, its transverse diameter at the upper part 9^ lines,at the lower 6-| lines; the rings cartilaginous, of moderate breadth, uniform,with a contracti
. The birds of America : from drawings made in the United States and their territories . ength, and varies in diameter from 8 to 6 rectum is 3^ inches long, the cloaca extremely large, forming a cavityabout 3 inches in diameter. The cceca are If inches long, cylindrical,rounded at the extremity; one of them 7 lines, the other 9 lines, in trachea, when moderately extended, measures 13|- inches in length,inconsiderably depressed, its transverse diameter at the upper part 9^ lines,at the lower 6-| lines; the rings cartilaginous, of moderate breadth, uniform,with a contraction in the middle before and behind, their number 134, thefour lowest united. The bronchi are composed of about 20 narrow car-tilaginous half rings. The contractor muscles are very broad, but thin, theirfibres irregularly disposed in front; they become thicker and narrowertoward the lower part, and are continued beyond the sterno-tracheal muscles,which come off from the 20th ring from the inferior larynx, to the mem-brane between the last tracheal and first bronchial ring. <• ; V. 1l I | 295 BLACK-THROATED DIVER. Colymbus Arctictjs, CCCCLXXVIL—Male, Female, and Young. One of the most remarkable circumstances relative to this beautiful bird,which is intermediate between the Red-throated Diver and the Loon, is theextraordinary extent to which the wanderings of the young are carried inautumn and winter. It breeds in the remote regions of the north, fromwhich many of the old birds, it would seem, do not remove far, while theyoung, as soon as they are able to travel, take to wing and disperse,spreading not only over the greater part of the United States, but beyondtheir south-western limits. In Texas I saw individuals of this species aslate as the middle of April 1S37; and I find it enumerated in a list of thebirds observed by Mr. J. K. Townsend on the Columbia river, where healso met with Colymbus glacialis. Its ramblings over a considerableportion of northern and
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectbirds, bookyear1840
