OF THE ALIAIENTARY TRACT 



73 



more commonly the result of rupture of the ulcer 

 through the intestme wall with escape of the content 

 of the bowel. 



Direct extension of the ulcers into the retroperi- 



FiG. 13. — Amoebic Colitis. 



Three amoebae within a tissue space in the subperitoneal coat of 

 the colon. Photomicrograph x 475. 



toneal tissues, instead of through the peritoneal cov- 

 erings, is not uncommon, with the progression of 

 tunnelling suppurative sinuses extensively through 

 the retroabdominal tissues, involving adjacent or- 



