AM(EB, OF THE INTESTINAL TRACT. 173 



mentioned. The gall bladder appears normal. The 

 kidneys appear enlarged and congested and upon 

 section show an acute congestion, with some thicken- 

 ing of the cortex. Externally the large intestine 

 appeared slightly, if at all, congested, although the 

 walls were markedly thickened. Upon opening the 

 large intestine it was found filled with fecal material 

 mixed with a large amount of pus, and blood-stained 

 mucus. About 1 cm. from the anus, which was blood- 

 stained and covered with mucus, there was an area 

 measuring 4 cm. in length, presenting the typical 

 lesions of amoebic dysentery, as they are observed in 

 man. The entire mucous membrane was swollen, 

 congested, and oedematous. Numerous nodular areas 

 projected into the lumen of the intestine, which, 

 when incised, were found filled with a glairy ma- 

 terial containing hundreds of Entamceba histolytica. 

 There were also numerous ulcerations, more or less 

 irregular in shape, with thickened and undermined 

 edges; many were covered in with necrotic tissue, 

 which, upon being removed, showed that the floor of 

 the ulcer was formed by the muscular coat of the 

 intestine. Many of these ulcers communicated with 

 one another beneath the mucous membrane, and most 

 of them had penetrated to the muscular coat. The 

 remainder of the large intestine presented numerous 

 ulcerations, typical of those seen in the intestine of 



