File:A history of British birds, indigenous and migratory- including their organization, habits, and relations; remarks on classification and nomenclature; an account of the principal organs of birds, and (14748617774).jpg

Identifier: historyofbritish01macg (find matches)
Title: A history of British birds, indigenous and migratory: including their organization, habits, and relations; remarks on classification and nomenclature; an account of the principal organs of birds, and observations relative to practical ornithology ..
Year: 1837 (1830s)
Authors: Macgillivray, William, 1796-1852
Subjects: Birds -- Great Britain
Publisher: London, Printed for Scott, Webster, and Geary
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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STRUCTURE OF BIRDS. 27 process by which the ribs are articulated to the transverse pro-cesses of the dorsal vertebrae; c7, <^, the heads of the ribs arti-culated to the bodies of the vertebrae; 6, ^, the thin laminarprocesses. The thorax is completed anteriorly by the sternum, w^hichis marked in Plate I. by the letters o, ^, q\ but which, form-
Text Appearing After Image:
FiG. 4. Sternal Apparatus of Golden Eagle. ing with the clavicles and scapulae, perhaps the most curiouslymodified part of the skeleton of birds, requires a separate illus-t rat ion. Fig. 4 then represents the Sternal Apparatus. In it are seenthe sternum, «, h, r, c?, e, f; the seven sternal ribs, g, g, g, g;the coracoid bones, A, h ; the scapulae, ^, i ; and the furculae,j, j, j. As is seen in Plate I, the sternum is a large expanded 28 INTRODUCTION. plate, extended over the whole anterior part of the thorax, andeven covering more or less of what may be considered theabdomen. In the Golden Eagle, Fig. 4, it is of an elongatedquadrilateral form, deeply concave internally, and having a pro-minent ridge or keel along the middle externally, so that, espe-cially with the costal ribs appended, it forcibly reminds one ofthe form of a ship. It varies greatly in the different tribes ofbirds, insomuch that it has been proposed as a basis for amethodical arrangement of the class, but in all is

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