The Muscles 113 



ObliqiLiis Abdominis Internus (Petit oblique, Ob- 

 liquus internus, Subcostalis) . Arises as a flat muscle 

 layer first with a strong tendinous portion from 

 the anterior dorsal border of the os pubis and 

 from the there-located cartilaginous inscriptio 

 tendinea of the rectus; second, by a dorsal por- 

 tion, with a short tendon, from the anteromedial 

 surface of the pubo-iliac articulation from the 

 pubis and ilium equally; third, from the dorsal 

 anterior ends of the last named bones. It is 

 inserted somewhat mediad to the lateral border of 

 the rectus ventralis muscle that covers it on the 

 outside. 



Transversus Abdominis (Transverse, Oblique 

 Bauchmuskel, Innerer Bauchmuskel, Transversus 

 ventralis). This muscle springs by short, flat, 

 indistinct forks from the inner surface of the prox- 

 imal ends of the dorsal ribs but does not reach the 

 centra of the vertebrse because of the long, broad 

 transverse processes. Caudally the origin passes 

 dorsalward to the lateral border of the quadratus 

 lumborum muscle between which and the ileo- 

 costalis muscle it is attached to the end of the 

 transverse process. 



Rectus Abdominis (Gerader Bauchmuskel-fpyra- 

 midenformiger Muskel, Pyramidalis, Rectus ab- 

 dominis -F pyramidalis) . This muscle consists, in 

 the Crocodilia, of several very distinct parts: 



I. The rectus ventralis, the chief part, arises 

 as a fleshy tendon from the sternum and from the 



