INTESTINAL 



131 



FIG. 39. lodamoeba b'utschlii. X 1650. A, stained vegetative ameba, showing 

 numerous food vacuoles and nucleus (n.), the latter with large central karyosome 

 and a single layer of granules between karyosome and nuclear membrane. B, 

 cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) 

 or "iodophilic body," from which these cysts received the name "Iodine or I. 

 cysts." (After Dobell.) 



FIG. 40. Dientamceba fragilis. X 1650. A, stained vegetative ameba, show- 

 ing two nuclei with granular karyosomes, and lood vacuoles; B, living ameba, 

 showing leaf -like pseudopodia. (A, after Dobell; B, after Jepps and Dobell.) 



FIG. 41. Councilmania lafleuri. X 1650. A, stained vegetative ameba with 

 a pseudopodium in early phase of protrusion and one nearly retracted and filled 

 with endoplasm; nucleus showing peripheral chromatin and large irregular, ec- 

 centric karyosome; endoplasm filled with food vacuoles. B, cyst showing 8 

 nuclei, thick wall, and chromaphile ridge (dark) nearly encircling body, and chro- 

 matoid bodies in form of scattered threads. C, cyst showing bud escaping with 

 one nucleus; large chromatoid body in center of cyst. (After Kofoid and Swezy.) 



