Identifier: contributionstoa00shuf (find matches)
Title: Contributions to the anatomy of birds
Year: 1882 (1880s)
Authors: Shufeldt, Robert Wilson, 1850- (from old catalog) United States. Geological and geographical survey of the territories. (from old catalog)
Subjects: Birds
Publisher: Washington
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ith the long axis of the sternal body ; that thesebones diverge from each other at an angle that is equal to the angle ofthe clavicular fourchette. From behind their heads the articulatedscapulae spring out at nearly right angles, and pass backwards parallelwith each other, fo be deflected outwards only as we near their posteriorpoints or extremities. After closing in the large utendinal foramina7by its broad superior dilatations, the furculum dips directly backwardsto bring its lower arch into the recess of the anterior concavity of thecarina of the sternum, but it never touches this bone at that point, andits near approach seems to vary for the same species; it is quite distantin the specimen of the King Vulture we present in figure 105, but inanother it comes much nearer. In the vast majority of the diurnal Falconidce of this country, and, nodoubt, in those of the Old World too, the clavicular heads have a muchmore extensive articulation with the superior ends of the coracoids than
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Circus hudsonius. we have just ascribed to the Cathartidce; this arrangement is closelyfollowed by Neophron, and, in short, the entire scapular apparatus ofthis bird is indubitably stamped with the well-known characteristicsthat mark this arch among the Hawks and Eagles. So interesting and 768 GEOLOGICAL SURVEY OF TIIE TERRITORIES. important a matter is this, that we feel sure that our reader will be gladto examine the cuts we present illustrating these points in representa-tive members of several of the families involved. The views are froman outer aspect of the joint in each case, showing the heads of the threebones of the scapular arch and the glenoid cavity. The bones are alllettered to correspond, and - directs attention to the furculum, 0 to thescapula, and a to the coracoid. The figure in the upper left-hand corner is of Catharista atrata, thefigure below is of Circus hudsonius; the remaining one is of Xeophronperc?iopterus. In Catharista we see the common plan for all of the C

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