. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . developed in the Raven, but requires careful dissectionto bring it into view. It arises on either side, from thelower margin of the ramus of the jaw, below the ramalvacuity. From these points it spreads out as a verythin, fan-like sheath, closely attached to the skin, tomeet iu a faint raphe in the median line. It will be seenthat the common muscular layer thus formed, materiallyassists in supporting the lingual apparatus and the upper THE DERMAL MUSCLES. 7 larynx, which are the chief str
. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . developed in the Raven, but requires careful dissectionto bring it into view. It arises on either side, from thelower margin of the ramus of the jaw, below the ramalvacuity. From these points it spreads out as a verythin, fan-like sheath, closely attached to the skin, tomeet iu a faint raphe in the median line. It will be seenthat the common muscular layer thus formed, materiallyassists in supporting the lingual apparatus and the upper THE DERMAL MUSCLES. 7 larynx, which are the chief structures found immediatelyabove it. When this muscle contracts, these parts willbe compressed and elevated. 6. Tlie dermo-tensor jmtugii.—That duplicature ofthe common integument, of a triangular form, which isfound in the Eaven, as in other birds, between the rootof the neck and the top of the shoulder, may be designatedas the parapatagimn, in contradistinction to the pro-patagium, or the alar integumental duplicature. Lying within the free marginal fold of the parapatagial drcrmio •Le,Tn,p^raZfCs. Fig. 1.—Eight lateral view of the skull and mandible ot Corvus corax sinuatus,designed to show the origin and inseition of the muscles of the head,&c. Life-size, by the author, cc, origin of the circnmconcha. duplicature in the Raven, we discover a well-developedbundle of muscular fibres, the mesial ends of whichspread out, to either become, as a few of them do,inserted into the skin upon the antero-aspcct of the rootof the neck, or else pass obliquely upwards to blend withthe fibres of the dermo-temporalis. This muscle Idesignate as the dermo-tensor patagii, and externally its g THE MYOLOGY OF THE RAVEN. fibres converge, and opposite the outer carneons extremityof the tensor patagii longus they become converted intoa small and delicate, thongh strong tendon, which soonthereafter blends with the tendon of the tensor patagiilongus, and in its action plays the part of an auxiliar
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmuscles, bookyear1890
