318 Sporozoa 





Fig. 6. 29. Triactinomyxon legeri Mackinnon and Adam (after M. & A.): 

 A. Sporoplasmic fragment approaching point of exit from spore membrane; 

 nuclei of valve cells shown below the sporoplasmic fragment. B. Sporoplasmic 

 fragment after leaving the spore. C. Growing biniicleate amoebula after re- 

 lease from a sporoplasmic fragment. D. Young pansporocyst, nuclei of cys- 

 togenous cells at the periphery. E. Pansporocyst containing two binucleate 

 stages. F. Pansporocyst containing two large cells and a number of smaller 

 ones; additional large and small cells are produced by division of each type. 

 G. Two sporoblasts derived from two zygotes within a pansporocyst. H. A 

 sporoblast in which the three capsulogenous cells have migrated to the upper 

 pole. I. Developing spore; three cystogenous cells (valve-cells) have migrated 

 to the lower pole; the seventh sporoblastic nucleus has produced a number 

 of daughter nuclei in the sporoplasmic mass. J. Young spore with developing 

 polar capsules and spore membrane; the seventh sporoblastic nucleus has not 

 yet divided in this case. A, B, xHOO; C-J, xl800. 



