. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . owards the median line,to unite in a raphe with the muscle coming from theopposite side, in front of the anus. These muscles serve to support the viscera here atthe lower part of the abdomen, and so, too, performthe function of that muscle found in certain of theMammalia known as the levator ani. 152. The depressor caudce is a strong conical muscle 1 But few comparative morphologists seem to have designatedthis muscle by the name I here bestow upon it, although Owen, Ibelieve, used it. Ga
. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . owards the median line,to unite in a raphe with the muscle coming from theopposite side, in front of the anus. These muscles serve to support the viscera here atthe lower part of the abdomen, and so, too, performthe function of that muscle found in certain of theMammalia known as the levator ani. 152. The depressor caudce is a strong conical muscle 1 But few comparative morphologists seem to have designatedthis muscle by the name I here bestow upon it, although Owen, Ibelieve, used it. Gadow (loc. cit., p. 129), presents us with thefollowing brief synonymy only, viz. :— 22. M. TRANSVERSO-ANALIS. M. levator ani ; M. transversus ossium pubis. Guilt, p. transverso-cloacalis. Gervais et Alix, p. 16.,, ,, ,, Watson, p. 71. Aufheber des Afters. Tiedemann, § 430. THE MUSCULATURE OF THE TRUNK. 313 which overlies the depressor coccygis, and one thatis devoted to pulling the tail downwards and out-wards, and by an equal contraction of the muscle ofthe opposite side, directly FIG. 75.—An anterior portion of the trunk of a Raven, with the sternum, muscles,and other parts extensively cut away in order to show the rudimentarymuscles of the diaphragm. The heart is pushed somewhat forward, andtensely covered by its membranes, &c. The dissecting-chains pull thelateral chest-walls apart. Life-size, by the author, from his owndissections. It arises from the lower half of the posterior borderof the ischium, and from the entire posterior border of 314 THE MYOLOGY OF THE RAVEN. the post-pubis beyond it, all of which is beneath theorigin of the transversus perinei. The fibres convergeas they pass backwards and inwards, and turn in sucha way as to permit the muscle to become attached tothe quill-butts of the three or four outer rectrices. This muscle must be cut across, and its extremitiesreflected, before we can thoroughly examine the nextone. 153. The depresso
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