400 MUSCLES. 



The iliac vessels pass beneath the crural arch on the inner 

 margin of the psoas magnus muscle, the vein being nearest the 

 pubes and the artery at the outer side of the vein. The fascia 

 iliaca being inserted into the crural arch as far as the vein, may 

 indeed be traced to. the crista of the pubes; it is so connected 

 with the vessels that no opening for hernia exists between them, 

 or indeed in all the space from the internal margin of the" vein 

 to the spine of the ilium. But at the inner side of the vein, 

 between it and Gimbernat's ligament, an opening appears, 

 called the Crural or Femoral Ring, and is the place where fe- 

 moral hernia commences, This opening is generally occupied 

 by a lymphatic gland, and a lamina of condensed but loosely 

 attached cellular substance, continuous with the Aponeurosis 

 Pelvica. 



SECT. IV. MUSCLES ON THE POSTERIOR FACE OF THE TRUNK. 



The Trapezius or Cucullaris, 



Is a beautiful broad muscle, immediately under the skin, co- 

 vering the back parts of the neck and thorax, and extending 

 from the bottom of the latter to the top of the former. Its an- 

 terior edge, above, is parallel with the posterior edge of the 

 sterno-cleido-mastoideus. Its posterior edge is joined with 

 that of its fellow, and below, it overlaps in part the latissimus 

 dorsi. 



It arises from the occipital protuberance, and from eight or 

 ten lines, sometimes more of the superior semicircular ridge of 

 the occiput, by a tendinous membrane. It arises also from the 

 five superior spinous processes of the neck through the inter- 

 vention of the ligamentum nucha?, and tendinous directly from 

 the two lower spinous processes of the neck, and from all of 

 the back. 



It is inserted fleshy into the external third of the clavicle, 

 tendinous and fleshy into the inner edge of the acromion pro- 

 cess, and into all the spine of the scapula. Its fibres having a 

 very extended origin, must of course converge in getting to. 



