LIFE CYCLE OF GYMNODINIOIDES INKYSTANS 15 



to the importance of growth at the trophic phase, thus 

 yielding two to thirty-two toniites. 



Important changes take place during this last period. 



Fig. 5. Gymnodinioides inkystans: palintomy. (a) Two tomonts. 

 (b) Eight tomonts. (c) Sixteen protomites. 



The rows x, y, z are progressively reduced in size. However, 

 an anterior segment of x has been detached which will give 

 rise to the primordium of the rosette or mouth organ. A 

 part of the rows h and c gradually becomes condensed in a 



