Identifier: myologyofravenco00shuf (find matches)
Title: The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds
Year: 1890 (1890s)
Authors: Shufeldt, Robert W. (Robert Wilson), 1850-1934
Subjects: Birds -- Anatomy Muscles Ravens
Publisher: London, New York, Macmillan and co.
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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joint, and in some birds to theos humero-scapulare ; and is inserted into the radialtuberosity of the humerus, which it helps to raise. Itis proportionally large in the Penguins and Gulls, butattains its greatest development in the Gallinaceousorder (loc. cit., p. 97). Mr. Forbes, who investigated the myology of theTubinares, collected during the voyage of the Chal-lenger, found the pectoralis tertius in them to be inthe form of a broad, thin band, more or less parallelwith the coracoid, occupying the superior half of thebroad space between that bone and the furcuki, its fibresarising chiefly from the strong membrane between thesebones, sometimes with additions from the anterior mar-gin of the coracoid, or from the body of the sternumclose to the middle line (Coll. Memoirs, p. 390). Before closing my account of this group of muscles, I THE MUSCLES OF THE UPPER EXTREMITY. 77 must call attention to one other fact in regard to thisthird pectoral, and that is this : after having dissected
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FIG. 26.—Superficial muscles, anterior aspect, of the upper extremity, as far asthe elbow, of a Raven. Drawn life-size by the author from his owndissections. All of these muscles are in their normal positions, but thesize of the figure did not admit of showing the insertions of the tensorpatagii slips, though their proximal moieties are shown in their properpositions. away the pectoralis major, in nearly all specimens, theouter margins of the second and third pectorals appear 78 THE MYOLOGY OF THE RAVEN. as though they were continuous, or a prolongation ofthe same oblique line ; this is indicated by the shadingacross the belly of the pectoralis tertius in Fig. 27. Invery muscular subjects, however, this muscle does notterminate at this line, but very delicate fibres passbeneath the fascia so as to cover an area of origin asindicated for the peetoralis tertius in Figs. 24 and 25,where its full extent or limit is shown for a very power-fully-developed, old muscular male bird.1 DORSAL

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