674 PROTOZOOLOGY 



ghian tubules of larvae of Pieris brassicae; spores 3.4/* by 1.5-2/* 

 (Paillot, 1918, 1929). 



P. lankesteriae Leger and Duboscq (Fig. 290, j). In the cytoplasm 

 of the gregarine, Lankesteria ascidiae, parasitic in the intestine of the 

 tunicate, Ciona intestinalis. It attacks only the gregarine which are 

 free in the lumen of the gut; the host nucleus does not undergo hy- 

 pertrophy; ovoid spores 2.5/* long. 



Genus Gurleya Doflein. Each sporont develops into four sporo- 

 blasts and finally into four spores. A few species. 



G. tetraspora D. (Fig. 290, k-o). In the hypodermal cells of 

 Daphnia maxima and Moina rectirostris ; spores pyriform, 2.8-3.4/* 

 by 1.4-1.6/* (Jfrovec, 1942). The infected host appears opaque white. 



G. richardi Cepede (Fig. 290, p, q). In Diaptomus castor; spores 4- 

 6/* by 2.8/*. 



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 (T. illinoisensis Kudo) (Figs. 76; 291, a-e). In the 

 fat bodies of the larvae of several species of Anopheles; spores 4-6/* 

 by 3-4/*; heavily infected larvae die without pupation; widely dis- 

 tributed. Spore-formation (Kudo, 1924). 



T. opacita Kudo (Figs. 287, c; 291, /, g). In the adipose tissue of 

 the larvae of Culex mosquitoes; spores 5.5-6/* by 3.5-4/* (Kudo, 

 1922, 1924a). 



T. reniformis Kudo and Hetherington (Fig. 291, h). In the gut 

 cells of the nematode, Protospirura muris, in mice; reniform spores 

 3-4/* by 1.5-1.8/* (Kudo and Hetherington, 1922). 



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. 287, /, g; 288; 291, i-l). In fat-bodies of 

 various culicine larvae; spores 12.5-16.5/* by 4-5/*; polar capsule 

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

 sure measures up to 350-400/* long (Kudo, 1925a). 



Genus Duboscqia Perez. Sporont develops into 16 sporoblasts and 

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

 species. 



D. legeri P. (Fig. 291, m-o). In the fat-body cells of Reticulitermes 

 lucifugus and R.flavipes. Trophozoites invade the peri-midintestinal 

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

 by 300/*, 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 4.3-5.9/* by 2.2-3/*; 



