3851 STUDIES ON MYXOSPORIDIA— KUDO 147 



MYXOBOLUS BRAMAE Reuss 



[Fig. 454] 



1906 Myxobolus bramae Reuss 1906 : 203-204 



Habitat: Branchiae of Abramis brama L.; Volga. 



Vegetative form: Cysts. Oval, O.Smm. long, 0.25mm. broad. Poly- 

 sporous. 



Spore: Oval to nearly spherical. Sutural edge narrow and with indis- 

 tinct folds. Two polar capsules, with a small triangular intercapsular 

 process. An iodinophilous vacuole. Dimensions: length 11 to 12/*, 

 breadth 9.25 to 10/x, thickness 4.5 to 5.5/i, polar capsules 4 to 5/i by 2.25/*. 



MYXOBOLUS CYPRINICOLA Reuss 

 . [Fig. 456] 

 1906 Myxobolus cyprinicola Reuss 1906 : 204 



Habitat: Branchiae of Cyprinus carpio L.; Volga. 



Vegetative form: Cysts, oval, 0.5mm. by 0.3mm. Polysporous. 



Spore: Elongated oval. Sutural edge narrow with many indistinct 

 folds. An iodinophilous vacuole. Dimensions: length 9.25 to 10/t, breadth 

 7 to 7.25/x, thickness 5 to 5.5/*, polar capsules 4.5/* by 2.5 to 3/*. 



MYXOBOLUS BALLERI Reuss 



[Fig. 455] 

 1906 Myxobolus balleri Reuss 1906 : 204-205 



Habitat: Branchiae of Abramis ballerus L.; Volga. 



Vegetative form: Cysts. Elongated, 1.5mm. by 0.5mm. Polysporous. 



Spore: Oval, slightly pointed at the anterior end. A triangular 

 intercapsular appendix. Sutural edge smooth. An iodinophilous vacuole. 

 Dimensions: length 11 to 12/*, breadth 9.25 to 10/*, thickness 5.5 to 6.5/*, 

 polar capsules 5.5/t by 2.75/*. 



MYXOBOLUS SQUAMAE Keysselitz 

 [Figs. 457 to 459] 

 1908 Myxobolus squamae Keysselitz 1908 : 273-274 



Habitat: Inner surface of the scales oi Barbus fluviatilis Agass.; Mosel 

 and Neckar. 



Vegetative form: Form variable; rounded, oval, elongated or rarely 

 branched. The outline of the body is not smooth but irregular with numer- 

 ous small tooth-like projections with which the body comes in contact 

 with the surrounding substance. The parasites seem to be able to dissolve 

 the substance composing the scale. Length 50 to 800/*. In one scale, one 

 or many, up to 8, individuals were found. All showed only advanced stages 

 of spore formation. The parasites are surrounded by a variously developed 

 envelope of connective tissue. Polysporous. 



