File:The birds of America - from drawings made in the United States and their territories (1840) (14565339617).jpg

Identifier: birdsofamericafr06audu (find matches)
Title: The birds of America : from drawings made in the United States and their territories
Year: 1840 (1840s)
Authors: Audubon, John James, 1785-1851 Bowen, John T., ca. 1801-1856?, lithographer
Subjects: Birds Birds
Publisher: New York : Published by J.J. Audubon Philadelphia : J.B. Chevalier
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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e, which is 5 feet 9 inchesin length, first forms in the usual manner the duodenal fold, at the distanceof 5 inches from the pylorus, encloses the pancreas, receives the biliaryducts, and passing under the right lobe of the liver, proceeds backward be-neath the kidneys, is convoluted in several large folds, and finally from abovethe stomach, passes in a direct course to the anus. Its coats are thick, itsinner surface villous, and its diameter is considerable, being in the first partof the duodenum T92, then for two feet from T% to T%, enlarged again to T62,and so continuing to the rectum, which is 6 inches long, ^ inch in diameter,and ends in an enlargement or cloaca, about an inch in diameter. The cceca,which commence at the distance of 6 inches from the anus, are 8 inches long,slender, -^ in diameter for 3 inches, afterwards about T32, with the extremityobtuse. The oesophagus and stomach contained young shoots of Zosteramarina, and in the latter were numerous particles of quartz. CO
Text Appearing After Image:
o ^ S i w ^ X RED-HEADED DUCK. 311 The trachea, when moderately extended, measures 10 inches in length,and is furnished with strong lateral or contractor muscles, a pair of endo-tracheal, and a pair of more slender sterno-tracheal. Its diameter at theupper part is 4;- twelfths, it gradually contracts to 3^ twelfths, enlarges to4^- twelfths, and at the distance of 7i inches from the upper extremity,forms a dilatation about an inch in length, and T72 in its greatest diameter,but composed of distinct rings, then contracts to ~^, and ends in a bony andmembranous expansion, forming on the left side an irregular thin disk, con-vex towards the right, and flattened towards the left, where it is membra-nous. The expansions of the trachea are thus similar to those of the Red-breasted Merganser, but of less extent; the rings are of equal breadth onboth sides, but alternately overlap each other, one side being partially con-cealed by the corresponding sides of those above and below it, while theo

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