STRUCTURES WHICH LIE BENEATH THE SPINO-UMBILICAL LINE. 



Edge of rectus 



abdominis (linea 



semilunaris). 



Ascending colon. 

 Crest of Ilium. 



Ileo-csecal valve. 



Anterior superior 

 iliac spine. 



Root of vermiform 

 appendix. 



Edge of rectus 



abdominis (linea 



semilunaris). 



Pelvis of ureter. 



Transverse colon. 



Terminal portion 

 of ilenm. 



FIG. 54. Diagram of the average position of the ileo-caecal valve, caecum, appendix, 

 and right ureter with relation to the line from the right anterior superior spine to 

 the umbilicus. (From Sir Frederick Treves's Cavendish Lecture, 1902. After Keith.), 



The spino-umbilical line runs from the anterior superior iliac spine to the umbilicus. 

 The point where it crosses the outer edge of the right rectus is called 

 " Monro's point," and corresponds in position to the ileo-csecal valve. The base of the 

 vermiform appendix lies rather more than an inch below this. The ureter crosses 

 the spino-umbilical line at the point of junction of its middle and inner thirds. 

 The eleventh dorsal nerve enters the sheath of the rectus near Monro's point. 

 The genito-crural nerve lies close to the ureter. 



[To face page 429. 



