THE TRUNK. 447 



Peritoneum. In the abdominal cavity : the small intestines, covered 

 by the great omentum. 



Lateral parts, inguinal regions, regg. inguinales (see next page). 



Iliac fossa, fossa iliaca interna, between the vertebral column, 

 the crista ilii and the crural arch are covered by m. iliacus and 

 psoas. Between them m. cruralis passes ; transversely behind the 

 psoas, art. ileo-lumbalis ; before it, n. genito-cruralis ; external to 

 it, n. inguino-cutaneus ; close to the crista iliaca, the art. circum- 

 flexa ilei. 



Vasa iliaca commun. and hypogastrica are covered by lami- 

 nated areolar tissue (fasc. proprid), and by : 



1 . Fasc. iliaca. Upon this lie : art. iliaca, in the direction of 

 a line between the navel and the centre of the crural arch, on the 

 anterior and outer side of the vein. 2. Peritoneum. 3. Co&cum 

 on the right, sigmoid flexure of colon on the left, &c., as far as the 

 external skin. The fascia iliaca envelopes the psoas above by its 

 attachment to the vertebral column, and proceeds below the crural 

 arch towards the trochanter minor, uniting with the fascia lata, 

 (and thus forms the passage which the pus takes in psoas abscess.) 



699. bis. Regio inguinalis, Inguinal region, 

 includes the parts which lie the breadth of two fingers above, and 

 the breadth of three fingers below, the bend of the thigh, plica 

 inguinalis. 



In the upper part, close above lig. Fallopice,\\Q behind the skin : 



1. Layers of fascia super/., cutaneous veins between them. 



2. V. superfic. abdom., to |" distant from annul, dbdom.; ex- 

 ternal to it, art. epigastrica superficialis. 



3. Lig. Fallopice and the inferior portion of the tendon of m. 

 obliq. extern. ; with annul, abdom. (l" removed from the sym~ 

 phys.pubis), and canalis inguinalis, which contains the spermatic 

 cord or lig. uteri rotund., art. sperm, extern., ram. intern, of 

 nerv. spermat. extern, and nerv. ileo-inguinalis. 



4. Behind the inguinal canal : fasciculi of m. obliq. intern, and 

 transversus. 



5. Fascia transversalis forms, two inches distant from the spina 

 iliaca anter. super., the annulus inguinalis (intern.}. 



6. Fascia propria (areolar tissue between fasc. transversal, and 

 peritoneum), with vasa epigastrica (interna),one fourth to half an 

 inch distant from the internal boundary of annul, inguin. (intern.). 



7. Peritoneum with its folds, and fovca inguinal, externa and 

 inter na. 



At the inferior part, below lig. Fallopice, lie behind the skin : 



