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HANDBOOK OF PROTOZOOLOGY 



shape, attached to the host's cell in pairs. The spore contains 

 eight sporozoites. One species. 



Pleiirocystis magna (Cuenot). In the seminal vesicle of 

 Lumhricus terrestris and L. herculeus. 



Genus Pterospora Racovitza and Labbe. Body pyriform, 

 the narrow end is prolonged into four bifurcated processes. 

 Solitary or associated with broad ends. Body capable of move- 

 ment. Cysts spherical or oval. The spore possesses dissimilar 

 extremities and its outer envelope (epispore) is drawn out into 

 three lateral processes. Number of sporozoites eight (?). 



Pterospora maldaneorum Racovitza and Labbe (Fig. 124, 

 e,f). In the body cavity of the worm, Liocephalus liopygiis. 



a-d. MonocysHs rostrata. (After Muslow). a-c, grown trophozoites 



(X45); d, a spore (X600). 

 , f. Pterospora maldaneorum. (After Labbe). e, grown trophozoites 



(X30); f, a spore (X400). 

 h. Lithocystis brachycercus. XlOOO (After Pixell-Goodrich). g, a 



trophozoite attached to the coelomic side of the host gut; h, a 



spore from life, 

 i. Two trophozoites of Urospora chiridotae in association. X150 



(After Pixell-Goodrich). 

 -1. Gonospora minchini. (After Goodrich and Pixell-Goodrich). j, a 



young sporozoite in host's egg ( X250) ; k, fully grown trophozoite 



in egg (X250); 1, free trophozoites in association (X60). 



Genus Cystobia Mingazzini. Body large; form irregular. 

 Fully grown trophozoite contains two nuclei, on account of the 

 early union of two individuals. The spore is oval and its enve- 



