MUSCLES OF THE TEUNK. 



69 



The whole muscle is attached by its most anterior fibres to the 

 cartilage of the xiphisternum, the rest passing- into an aponeurosis 



Fig. 63. 



Muscles of trunk of Rana cscitlcnta, from the right side. 



cd M. ciitaiieus fenioris. 



d M. deltoideus. 



d.m. M. depressor maxillae. 



i M. inf ra.spinatiis. 



Id M. latiss. dorsi. 



oe M. obliquus abdom. externus. 



oe' Scapular origin of same. 



ss M. siibscaimlaris. 



t M. triceps brachii. 



which, inseparably connected with the Imcrlpiiones iendineae, traverses 

 the lower surface of the m. rectus ahdominalis to the llnea alba. 



30. M. ohVujuus internas (and transversus), (Figs. 64, 6^ oi). 



Dugès, ileo-transverso-sous-sternal, p. 53. — Zenker, iransversus, I. c, 

 p. 31. — Kuhl, fransverstis, I.e., p. 116. 



This muscle corresponds with the combined obliqn/is internns and 

 Iransversus, and has therefore been described either as the one or the 

 other, by various authors. 



The fibres arise tendinously — 



a. From the transverse processes of the vertebrae from the 

 fourth backwards, and from the fascia covering the mm. mtertrans- 

 versarii. 



b. From the iliac bone, by a strong tendon from its upper border, 

 and by a few weaker fibres from its outer surface. The latter fibres 

 are covered by the former, and these end posteriorly in a sharp 

 concave border. 



The muscular bundles diverge from these points, some running 

 forwards, some backwards; the former are only partially covered 

 by the port'io omo-afjdoininalis of the in. oljltquus externus (compare 



