20 JOURNAI. OF THK 



Mivart ag'ain g-ives an inaccurate orig-in: "from the 

 sternum between the second and sixth costal carti- 

 lag-es." Gorham and Tower agree with Mivart. 



The fifth j^cct oral, the most posterior member of the 

 g*roup, is long" and comparatively narrow. The mus- 

 cle arises from the aponeurosis of the external oblique, 

 which here forms a ventral covering- for the reetus ab- 

 dominis. In the anterior portion of the orig-in, the 

 muscle fibres arise directly from the median line, where 

 there is raphe common to the several muscles of the ab- 

 dominal wall. Posteriorly, however, the muscle fibres 

 arise from the aponeurosis, along- a line which extends 

 obliquely, in a dorsal and posterior direction, from the 

 mid-ventral line. 



The muscle is inserted by aponeurosis both into the 

 bicipital arch, and the proximal end of the humerus. 

 The latter insertion includes both tuberosities. 



Synonomy. Seeo)id chef du grand pectoral, S.-D., 

 vol. II, p. 341; xiphi-hiimeralis, W. & G., p. 2^^^ t^c- 

 toralis, part 4, M., p. \M\ pectorals, part d, G. & T., 

 p. 31. 



The details of the orig-in of this muscle are doubtless 

 variable. Wilder & Gag-e state that the muscle fibres 

 are connected to the median raphe by a thin, wide ten- 

 don. Mivart is, however, entirely mistaken as to the 

 orig-in. He g-ives the muscle as arising- "from the ster- 

 num between the fifth costal cartilag-e and the root of 

 the xiphoid." Gorham and Tower g-ive the same ori- 

 g-in as Mivart: "from the sternum between the carti- 

 lag-es of the fifth and eig-hth ribs." 



SOME MUSCLES OF THE HIND-EEG AND BACK. 

 Tensor vag-inae femoris. The muscle arises from 

 the anterior end of the ilium, and from the fascia ex- 



