MICROSPORIDIA 539 



Genus Glugea Thelohan. Each sporont develops into 2 spores; 

 the infected host cells become extremely hypertrophied, and trans- 

 form themselves into the so-called Glugea cysts. Many species. 



G. anomala (Moniez) (Fig. 257, I, m). In the connective tissue of 

 stickle backs; spores 4-6^ by 2-3;u. 



G. millleri Pfeiffer. In muscles of Gammarus; spores 5-6m by 2-3iii. 



G. hertwigi Weissenberg (Figs. 255, h; 257, n). In various tissue 

 cells of Osmerus; spores 4-5. 5m by 2-2. 5/x. 



Genus Perezia Leger and Duboscq. Each sporont produces 2 

 spores as in Glugea, but infected host cells are not hypertrophied. A 

 few species. 



P. mesnili Paillot (Fig. 257, o). In cells of silk glands and Malpi- 

 ghian tubules of larvae of Pieris brassicae; spores 3.4/x by 1.5-2ju. 



Genus Gurleya Doflein. Each sporont develops into 4 sporoblasts 

 and finally into 4 spores. Not common. 



G. richardi Cepede (Fig. 257, p, q). In Diaptomus castor; spores 

 4-6m by 2.8m. 



Genus Thelohania Henneguy. Each sporont develops into 8 sporo- 

 blasts and ultimately into 8 spores; sporont membrane may degen- 

 erate at different times during spore formation. Numerous species. 



T. legeri Hesse (Figs. 71; 259, a-e). In fat-bodies of anopheline 

 larvae; spores 4-6/x by 3-4/x; heavily infected larvae die without 

 metamorphosing into adults; widely distributed. 



T. opacita Kudo (Figs. 255, c; 259, f-h). In fat-bodies of culicine 

 larvae; spores 5.5-6m by 3.5-4^. 



Genus Stempellia Leger and Hesse. Each sporont produces 1, 2, 4, 

 or 8 sporoblasts and finally 1, 2, 4, or 8 spores. 2 species, 



S. magna Kudo (Figs. 255, /, g; 256; 259, i-l). In fat-bodies of 

 various culicine larvae; spores 12. 5-16. 5m by 4-5m; polar capsule 

 visible in life; polar filament when extruded under mechanical pres- 

 sure, measures up to 350-400m long. 



Genus Duboscqia Perez. Sporont develops into 16 sporoblasts and 

 finally 16 spores. Host-cell nuclei extremely hypertrophied. One 

 species. 



D. legeri P. (Fig. 258, d-g). In the fat-body cells of Reticulitermes 

 lucifugus a,nd R.flavipes. Trophozoites invade the peri-midintestinal 

 adipose tissue cells which become enlarged into "cysts," up to 660m 

 by 300m, because of active multiplication of the organisms; each 

 binucleate schizont becomes a sporont which grows and produces 16 

 spores. Spores ovoid to ellipsoid; fresh spores are 4. 3-5. 9m by 2.2-3m; 

 sporoplasm uninucleate; extruded polar filament 80-95m long. 



Genus Trichoduboscqia Leger. Similar to Duboscqia in number of 



