File:Contributions to the anatomy of birds (1882) (14568548380).jpg

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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allelogramic in outline, with well-defined angles; onthe other hand, among the Falconidcc and the Owls and their alliesthis bony plate is drawn upwards and backwards into a rounded point;we give examples of this in the cuts, as well as exceptions to the rule. Neophron has a strong tendency Falcon-wards in this respect, lessmarked in Gypogeranus. We also present the reader, in each case, except in the two outlinesfrom Mr. Lucas, with a posterior view of this bone, which will show thegreat variability of outline of the pygostyle, better than any descrip-tion could do, however elaborate it might be made. An ellipticalforamen, in some cases two (GyjMrchus), pierce this plate at about thelocality the last coccygeal vertebrae fused with the one next behind,forming, as it were, a point that the process of osseous amalgamationfailed to fill in. This feature is rare among the Fakonida\ Among SHUFELDT. OSTEOLOGY OF THE CATHARTIDiE. 761 PVGOSTYLES OF VARIOUS OLD AND NEW WORLD VULTURES AND HAWKS.
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a and a lateral and rear view of pygostyle of Sarcorhamphus gryphus, respectively: 5 and b thesame for Gyparchus papa; c, c, for Cathartes aura,; d, d, Caiharista atrata,■ e, e\ Neophron perc-nopterus; /, /, Gypogeranus serpentarivs; g, Otogyps calms; g, Vvltvr cinerea,- h. h, Tinnunculussparverius; i and i, Accipiter cooperi; j, j\ Micrastur brachypterus ; k, k> Circus hudsonius; ZandI, Polyborus tharus. 762 GEOLOGICAL SURVEY OF THE TERRITORIES. the cuts, a, a is an outline sketch of the pygostyle from Sarcorhamphusgryphus ; it shows very well, and is, in fact, Typical of the parallelo-gramic form this bone assumes in the Gathartidce; b and b is the lat-eral and posterior view of the bone from GyparcJtuspapa ; in this Vulturewe observe that the upper portion of the bone, or rather the upper andposterior angle, is very much thickened. Gatliartes aura, shown in c and c\ still retains the usual outline of theother Vultures of this family, while in Catharista atrata, d and d, thelow

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