394 



PROTOZOOLOGY 



flagella arise from the posterior tips of axostyles; a deeply staining 

 body may be found in cytoplasm. 



The cysts are ovoid and refractile; 8-14/x by 6-lOju; cyst wall thin; 

 contents do not fill the wall; 2 or 4 nuclei, axostyles, fibrils and fla- 

 gella are visible in stained specimens. 



This flagellate inhabits the lumen of the duodenum and other 



Fig. 169. a, Hexamita meleagridis, X1875 (McNeal et al.)\ b, an egg 

 of Deropristis inflata containing Hexamita, X770 (Hunninen and Wich- 

 terman); c-g, Giardia intestinalis, X2300 (c, front and d, side view of 

 living organisms; e. stained trophozoite; f, fresh and g, stained mature 

 cysts) . 



