. A manual of zoology. PHYLUM CHORDATA 473 wing, by which the bird rises into and propels itself through the air, is performed by the pectoralis (Fig. 2S6, pet), an immense muscle having about one-fifth the total weight of the body; it arises from the whole of the keel of the sternum [car. si), from the posterior part of the body of Aw /. prptffm prn b â gU\t"^/Unabr \c^ I ' â cor /$Â¥ff^-r^r. Fig. 286. â Columba livia. The principal muscles of the left wing; the greater part of the pectoralis (pet) is removed, car. si, carina sterni: cl, furcula;
. A manual of zoology. PHYLUM CHORDATA 473 wing, by which the bird rises into and propels itself through the air, is performed by the pectoralis (Fig. 2S6, pet), an immense muscle having about one-fifth the total weight of the body; it arises from the whole of the keel of the sternum [car. si), from the posterior part of the body of Aw /. prptffm prn b â gU\t"^/Unabr \c^ I ' â cor /$Â¥ff^-r^r. Fig. 286. â Columba livia. The principal muscles of the left wing; the greater part of the pectoralis (pet) is removed, car. si, carina sterni: cl, furcula; cor, coracoid; cor. br. br, coraco-brachialis brevis; cor. br. Ig, coraco-braclralis longus; cp. st, corpus sterni; ext. cp. rd, extensor carpi radial is; cp. ul, extensor carpi ulnaris; /I. cp, ul. flexor carpi ulnaris; gl. c, glenoid cavity: hu, head of humerus; hu', its distal end; pet, pectoralis; pet', its cut edge; /r/",its insertion; prn. br, pronator brevis; prn. Ig, pronator longus; Pr. pigm, pre- patagium; pt. ptgm, post-patagium; sb. ch>, sub-clavius; sb. civ , its tendon of insertion passing through the foramen triosseum, and dotted as it goes to the humerus; tns. ace, tensor accessorius; , tensor brevis; tns. Ig, tensor longus; tns. m. p, tensor membrane posteriori* ala^. that bone {cp. sf), and from the clavicle {cl), filling nearly the whole of the wedge-shaped space between the body and the keel of the sternum, and forming what is commonly called the " breast" of the bird. Its fibres converge to their insertion (J>cf) into the ventral aspect of the humerus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan &a
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1900
