. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . with the form of the osseous elements to which it isattached. About three years ago, I published an article entitled A Review of the Muscles used in the Classification ofBirds (see 124 of the Bibliography at the end of this Obturator internus. Owen, Apteryx, p. 292 ; Reid, p. 143 ; Gurlt, p. 28. ,, „ Garrod. ,, ,, Queimerstedt, p. 14. ,, ,, Neander, p. 12. ,, „ Watson, p. 108. Abducte^lr interne de la cuisse. externe. Gcrvais et Alix, p. 31 ; Alix, p. 434,/. obtu
. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . with the form of the osseous elements to which it isattached. About three years ago, I published an article entitled A Review of the Muscles used in the Classification ofBirds (see 124 of the Bibliography at the end of this Obturator internus. Owen, Apteryx, p. 292 ; Reid, p. 143 ; Gurlt, p. 28. ,, „ Garrod. ,, ,, Queimerstedt, p. 14. ,, ,, Neander, p. 12. ,, „ Watson, p. 108. Abducte^lr interne de la cuisse. externe. Gcrvais et Alix, p. 31 ; Alix, p. 434,/. obturator. Gadow, No. 19. UJ LIBRAR 192 THE MYOLOGY OF THE RAVEN. volume), in which I made certain remarks upon thearea of the origin of the obturator internus. As theybear upon what I have just said in the last paragraph,they will be of value for comparison in the present con-nection, and so are here republished : this applies moreparticularly to the figure (53 bis), also given, as it repre-sents the parts in question as they occur in that curiousbird the Pinon Jay, one of the Corvidce of the western. FIG. 53 bis.—Eight three-quartering view of the pelvis of a specimen of thePinon Jay (Cyanocephalus cyanoecphalus), showing the origin of theobturator internus muscle of the right side, Drawn by the authorfrom the specimen, and somewhat enlarged. part of the United States. In the paper to which Ihave just referred, I said, substantially, of the obturatorinternus, that In birds this muscle arises, as shown inthe figure, from the ventral surface of the pelvis, itsfibres being attached to the post-pubic bone and theischium. As a rule it is a bipenniform muscle, its fibresbeing directed forwards, but at the same time, on either THE MUSCLES OF THE LOWER EXTREMITY. 193 side of its own moiety, towards a longitudinal tendinousand mid-line of its own. This tendon becomes stronger as o it approaches the obturator foramen, and passing throughthis, is finally inserted into the head of
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