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HANDBOOK OF PROTOZOOLOGY 



Tetractinomyxon intermedium Ikeda (Fig. 134, a), and T. 

 irregulare Ikeda. Parasitic in the coelom of the sipunculid, 

 Petalostoma minutum. 



Family 2 Triactinomyxidae 



Genus Triactinomyxon Stole. The three valves of the spore 

 membrane are drawn out into long processes and the whole 

 spore appears as an anchor. Parasitic in the gut-epithelium of 

 oligochaetes. 



Triactinomyxon ignotum Stole (Fig. 134, d). Each spore pos- 

 sesses eight sporoplasms. 



IVk/^' 



Fig. 134 a. Stained spore of Tetractinomyxon intermedium. X600 

 (After Ikeda). 



b. Spore of Sphaeractinomyxon stolci. X450 (After Caullery 

 and Mesnil). 



c. Spore of 5. gigas. X500 (After Granata). 



d. Spore of Triactinomyxon ignotum. X200 (After Leger). 



e. Spore of Hexactinomyxon psammoryctis. X225 (After Stole), 

 f , g. Polar and side view of spore of Synactinomyxon tubificis. 



X450 (After Stole). 

 h. A fresh spore of Neoactinomyxum globosum. X650 

 (After Granata). 



Triactinomyxon legeri Mackinnon and Adam. With 24 

 sporoplasms. 



Triactinomyxon dubium Granata. With 32 sporoplasms. 



