286 



SUMMAKY OF CURRENT RESEARCHES RELATING TO 



prawn, Leander {PaJsemon) serrahis, infected with Thelohania octospora, 

 spores with three long tails were obtained. The tails are delicate 

 prolongations of the epispore. Inside the sporocyst they are curled 

 round the spores and take up a considerable amount of space. When 



Spore of Thelohania drawn from the living at an approximate magnification of 



2000, showing the three tails. 



the sporocyst is only ruptured at one spot a tuft of tails from the 

 enclosed eight spores often projects through the fissure. When dilute 

 iodine solution is run into the preparation a polar filament is sometimes 

 shot out from the end opposite the tails. This is apparently the first 



Spore of Thelohania after treatment with iodine and blue black ink, showing the 

 polar filament extruded from the opposite end from the tails. 



recorded instance of a tailed spore in true Microsporidia, and furnishes 

 another point of resemblance between these parasites with minute spores 

 provided with a polar filament and the family Haplosporidiidte, many 

 members of which have tailed spores but never a polar filament. 



J. A. T. 



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