ILLUSTRATIONS. 



Plate I. From Case I. Large intestine, Balantidiitm coU infection. Showing 

 early lesions, consisting of numerous small erosions and ulcerations 

 in the mucosa. 

 II. From Case II. Large intestine, Balantidium coli infection. Showing 

 advanced ulcerative lesions. 



III. Large intestine. Fig. 1. Numerous parasites in the submucosa. Fig. 



2. Two parasites in a blood vessel in the submucosa. 



IV. Lymphatic gland, showing area of necrosis. Fig. 1. Eight of the 



parasites may be seen distinctly in the photograph. Fig. 2. A single 

 parasite lying near an area of necrosis. 

 V. Lymphatic gland. Fig. 1. Single parasite. Fig. 2. Four parasites may 

 be observed lying in spaces in the lymphoid tissue about an area 

 of necrosis. 



91853 3 42.3 



