LIFE CYCLE OF GYMXODIXIOIDES INKYSTANS 13 



During these divisions, all the rows remain bipolar, except 

 the system .t, ij, z. The anterior and posterior parts of this 

 system disappear before each division, and only three short 

 segments remain in the equatorial part. The kinetodesma, 



Fig. 3b. 



as well as the kinetosomes, disappears, as if the maintenance 

 of the kinetosome, as well as its growth and division, de- 

 pended on the properties of the underlying cytoplasm. As 

 we shall see, this conclusion will be reached frequently. 



Divisions continue. One more ciliary row, c, has been 

 formed. The division stops when the size of the tomites is 

 reached. This happens after one to five divisions, according 



