CILIOPHORA 



455 



is kidney-fehaped and the accessory nucleus lies in contact with 

 it. Multiplicaton takes place by simple transverse fission. 

 Conjugation and cyst formation have been observed. 



A B C D 



Pig. 219. — Balantidium coli. A, Fully developed individual, showing the 

 nucleus above at the right and a food partifile below. B and C, Division stages. D, 

 Conjugation. {From Dofiein after Leuckart.) 



Bal. coli is sometimes found in man in cases of intestinal dis- 

 order with diarrhea. Its possible causal relation to the' pat ho- 



FiG. 220'. — Section through the intestinal wall in a, case of enteritis due to 

 Balantidium. S, Serosa; M. Muscularis; B, Balantidia. {From Doflein after Solow- 

 jew.) 



logical condition is not conclusively ascertained. In some in- 

 stances the cells of Balanlidium have been f Qund deeply situ- 



