326 



ABDOMINAL MUSCLES. 



1. Ohliquus Descendens Ext emus, 



Arises, by eight heads, from the lower edges of an equal num- 

 ber of the inferior ribs, at a little distance from their cartilages : 

 it always intermixes in a serrated manner, with portions of the 



Fig. 82 * 



* The muscles of the anterior aspect of the trunk ; on the left side the 

 superficial layer is seen, and on the right the deeper layer. 1. The pectoralis 

 major muscle. 2. The deltoid ; the interval between these muscles lodges the 

 cephalic vein. 3. The anterior border of the latissimus dorsi. 4. The serra- 

 tions of the serratus magnus. 5. The subclavius muscle of the right side. 6. 

 The pectoralis minor. 7. The coraco-brachialis muscle. 8. The upper part of 

 the biceps muscle, showing its two heads. 9. The coracoid process of the 

 scapula. 10. The serratus magnus of the right side. 11. The external inter- 

 costal muscle of the fifth intercostal space. 12. The external oblique muscle. 

 13. Its aponeurosis ; the median line to the right of this number is the linea 

 alba ; the flexuous line to its left is the linea semilunaris ; and the transverse 

 lines above and below the number, the lineae transversa^, of which there were 



