16 



MANUAL OF HUMAN PROTOZOA 



2. Stained specimens. In the majority of individuals 

 (Fig. 2, 2-5)^ the body outhne is more or less romided and 

 the cytoplasm is generally reticulated. Some individuals 





# 



^» 





Q. 



.0 











W^' 



S 6 8 g 



Fig. 2. Entamoeba coli. x 1150. (original) 

 1. A living amoeba. 

 2-5. Stained trophozoites. 

 3. A trophozoite infected by Sphaerita. 



6. A precystic amoeba. 



7. A fresh cyst. 



8. A stained yomig cyst with a large glycogen vacuole. 



9. A stained mature cyst. 



(Fig. 2, 2, 4) ii-,ay show the division between the ectoplasm 

 and endoplasm. In the food vacuoles are found chiefly bac- 

 teria, numerous inorganic faecal debris, and also micro- 

 organisms which co-exist in the lumen of the colon. The 



