THE SPOROZOA 



147 



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 





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 truttce begins 

 to grow in the lymph surrounding the intestine. The sporozoite 

 develops into a small amoeboid form which penetrates the muscle- 



