371] 



STUDIES ON MYXOSPORIDIA—KUDO 



133 



breadth. Color of the cyst whitish with black scattered granules on the 

 surface. 



Spore: Oval, much wider behind than in front and pointed at the 

 anterior end. Sutural ridge is slightly thickened. A single polar capsule, 

 showing much coiled polar filament. lodinophilous vacuole l.ifx in diame- 

 ter. Dimensions: length 13.2 to 13.6)u, breadth 10.1 to 10.3/i, length of 

 polar capsule 4/x, length of polar filament 43/i (in one case). 



MYXOBOLUS MISGURNI nov. spec. 

 [Figs. 377 to 378] 

 1916 Myxobolus fuhrmanni Kudo 1916:5 



Habitat: Gall-bladder of Misgurnus anguillicaudatus ; Tokio (Septem- 

 ber). About 50% of the fish examined showed a few isolated spores 

 floating in the bile. 



Vegetative form: Unobserved. 



Spore: Form elongated pyriform, with attenuated anterior and rounded 

 posterior ends. Shell uniformly thick. Over sutural edge, shell exhibits 

 many (up to 12) triangular markings. Sutural ridge distinct. A single 

 pyriform polar capsule at the anterior end. Sporoplasm contains an 

 lodinophilous vacuole and two nuclei. Coiled polar filament distinct in 

 vivo. Dimensions of fresh spores: length 14 to 15.5/Lt, breadth 6 to 7.3^, 

 thickness 5 to 6/i, polar capsule 6.3ju by 2 to 3n, length of polar filament up 

 to 100m. 



Remarks: The writer reported this species as identical with Myxobolus 

 fuhrmanni Auerbach. By repeated reexamination and comparison with 

 Auerbach's description, however, he came to the conclusion that the 

 present form should be treated as a new species, on account of the difference 

 of the host and the characters of the spore. 



MYXOBOLUS PFEIFFERI Thelohan 

 [Figs. 379 to 385] 



