THE SPOROZOA 



is left exposed in the lumen of the digestive organ (Fig. 77, C}. If it 

 is a polycystic or multi-chambered form, the exposed portion becomes 

 differentiated into protomerite and deutomerite, while the intra- 

 cellular portion remains as the epimerite. After growth, the surplus 

 food is stored in the endoplasm in the form of granules as described 



A 



B 



Fig. 81. Lymphosporidium truttce Calkins. 



A. The young sporozoite and its development. B. Older forms in the muscle-bundles surround- 

 ing the intestine. C. Still older amoeboid form prior to, and during, spore-formation. 



above, to be used during the process of spore-formation and encyst- 

 ment. 



In Sarcosporidiida and other muscle-infesting Sporozoa, growth 

 takes place at the expense of the muscle-cells, although the organisms 

 are not intra-cellular parasites. Thus, Lymphosporidium trutta begins 

 to grow in the lymph surrounding the intestine. The sporozoite 

 develops into a small amoeboid form which penetrates the muscle- 



