166 ILLINOIS BIOLOGICAL MONOGRAPHS [404 



Vegetative form: One cyst, Imm. in diameter. 

 Spore: Tail short. Zschokke quotes: length 8 to 10)u. 

 Remarks: According to Zschokke, this species is identical with H. 

 zschokkei. 



HENNEGUYA TENUIS Vaney et Conte 

 [Fig. 515] 

 1901 Henneguya tenuis Vaney and Conte 1901 : 103-106 



Habitat: Connective tissue of alimentary tract of Acerina cernua L.; 

 Lyon (February). 



Vegetative form: Numerous cysts particularly in the pyloric coecum. 

 Usually spherical. Size: 30 to 150/i in diameter. 



Spore: Oval and small. Tail short. Two polar capsules at the anterior 

 end. Sporoplasm with a nucleus, rod-shaped, with somewhat enlarged 

 ends which is located at right angles to the longitudinal axis. lodinophilous 

 vacuole could not be traced. Dimensions: length 4/i, breadth 2/1. 



HENNEGUYA NUSSLINI Schuberg et Schroder 

 [Figs. 516 and 517] 

 1905 Henneguya nilsslini Schuberg and Schroder 1905 : 56-59 



Habitat: Subcutaneous connective tissue at the base of dorsal fin of 

 TruUa fario L.; Gutach. 



Vegetative form: Trophozoites form cysts (2 cysts found). Cysts 

 lenticular, 1.5 to 2mm., surrounded by many concentric layers of fibrous 

 connective tissue. Cysts containing only mature spores. 



Spore: Broad oval form, flattened. Anterior end rounded. Tail at 

 the posterior end. Shell somewhat thick, often shows sutural ridge. Tail 

 filaments two. A "dark part" which in side-view is of triangular form, 

 runs into the tail. Sporoplasm, occupying the posterior half of the spore, 

 projects a narrow portion between the polar capsules beyond the middle of 

 the capsules. Sporoplasm, uniformly granular, contains an iodinophilous 

 vacuole and one, sometimes two nuclei connected by nuclear bridge. 

 Polar capsules, pyriform, opening independently. Coiled polar filament 

 observable, coiled 6 to 7 times. Dimensions: length excluding tail 12jLt, 

 length with tail 32m, breadth 8 to 9n, polar capsules 5^ by 3^, length of 

 polar filament 4 to 5 times longer than that of spore excluding tail (48 to 

 60m). 



HENNEGUYA LEGERI Cepede 

 [Figs. 518 to 523] 



1905 Henneguya legeri C6pede 1905 : 905-913 



1906 Henneguya legeri C6pede 1906 : 66 

 1913 Henneguya legeri Cepede 1913 : 302-305 



Habitat: Urinarv bladder of Cohitis barbatida L.; Isere (January). 



