678 PROTOZOOLOGY 



cyclops viridis; spores 18m by 3m; polar filament 110m long; sporo- 

 plasm with 1-2 nuclei or 2 uninucleate sporoplasms. 



Genus Octosporea Flu. Spore cylindrical; more or less curved; 

 ends similar. 6 species (Jirovec, 1936a). 



0. muscae-domesticae F. (Fig. 292, I). In gut and germ cells of 

 Musca and Drosophila; spores 5-8 m long (Chatton and Krempf, 

 1911). 



Genus Spiroglugea Leger and Hesse. Spore tubular and spirally 

 curved; polar capsule large. One species. 



S. octospora L. and H. (Fig. 292, m, n). In fat body of larvae of 

 Ceratopogon sp.; spores 8-8. 5m by 1/x. 



Genus Toxoglugea (Toxonema) Leger and Hesse. Minute spore 

 curved or arched in semi-circle. 4 species (Poisson, 1941). 



T. vibrio L. and H. (Fig. 292, o, p). In the fat body of Ceratopogon 

 sp.; spores 3.5m by less than 0.3ju. 



T. gerridis Poisson (Fig. 292, q). In the fat body of the bug, 

 Aquarius najas; sporont gives rise to eight sporoblasts and then to 

 eight spores; also monosporous; microspores 4.5m by 0.8m, the polar 

 filament 40-50m long; macrospores 7-8m long. 



Suborder 2 Dicnidea Leger and Hesse 



Family Telomyxidae Leger and Hesse 



Genus Telomyxa Leger and Hesse. Spore with 2 polar capsules; 



sporont develops into 8, 16, or more sporoblasts and finally 8, 16, 



or more spores (Leger and Hesse, 1910). Four species (Poisson, 1941). 



T. glugciformis L. and H. (Fig. 292, r, s). In the fat body of the 



larva of Ephemera vulgata; spores 6.5m by 4m. 



Order 4 Helicosporidia Kudo 



This order has been created to include the interesting organism, 

 Helicosporidium, observed by Keilin. Although quite peculiar in the 

 structure of its spore, the organism seems to be best placed in the 

 Cnidosporidia. 



The minute spore is composed of a thin membrane of one piece 

 and of three uninucleate sporoplasms, around which is coiled a long 

 thick filament. Young trophozoites are found in the host tissues or 

 body cavity. They undergo schizogony, at the end of which uninu- 

 cleate sporonts become differentiated. A sporont divides apparently 

 twice and thus forms four small cells which develop into a spore. 

 The complete life-history is still unknown. 



Genus Helicosporidium Keilin. Parasitic in arthropods; schizog- 



