148 



THE PROTOZOA 



bundles, and there grows to adult size by absorbing food destined for 

 the muscles. When mature, it leaves the muscle-bundles and returns 

 to the lymph-spaces, where it sporulates (Fig. 81). 



D. MOTION 



In addition to the amoeboid motion which has already been men- 

 tioned, there are various movements, due to the contraction of the 

 myonemes or of the entire ectoplasm. Among these may be men- 





i- -S 



Pig. 82. Cortical modifications and movement of a gregarine. [SCHEWIAKOFF.] 

 A. Moving gregarine with paths of excreted granules. B and D. The same, more highly mag- 

 nified. Cand/i. Details of structure, c, cortical plasm ; /, jelly-layer ; m, myoneme ; s, secretion. 



