CLASSIFICATION 725 



Genns : Ceratomyxa. Thelohan, 1892. 

 Shell valves conical and hollow, attached on the bases; free ends 

 extended, tapering to more or less sharply pointed or rounded ends. 

 Sporoplasm usually does not fill the cavity, but is located asymmetrically 

 in it. Thirty-five species, Disporous (twenty-three species), mono- 

 sporous and disporous (three species), disporous and polysporous (four 

 species), and unknown (five species). All (except two species in urinary 

 bladder) in the gall bladder of marine fish. Type species: Ceratomyxa 

 arcuata Thelohan. 



Ge»«s .• Myxoproteus Doflein, 1898, emend. Davis, 1917. 



Spores roughly pyramidal; with or without distinct processes from the 

 base of the pyramid. Three species. Disporous (one species unknown). 

 All in urinary bladder of marine fish. Type species: Myxoproteus ambiguus 

 (Thelohan) Doflein. 



(Te»«s.- Wardia Kudo, 1919. 



Spore form of isosceles triangle with tw^o convex sides. Oval in profile. 

 Surface of shell with fine ridges which turn into fringe-like processes at 

 the posterior end. The polar capsules, large and perfectly spherical, 

 situated at the central portion of the spore, opening at the anterior tip. 

 Two species. Polysporous (one species unknown). Tissue parasite (one 

 species) of fresh-water fish and amphibia, both found in Illinois, U.S.A. 

 Type species: Wardia ovinocua Kudo, 1919. 



GewHs.- Mitraspora Fujita, 1912, emend. Kudo, 1919. 

 Spores spherical or ovoidal. Two polar capsules pyriform, one situated 

 on each side of the sutural plane. Shell longitudinally striated, with or 

 without long and fine filaments projecting posteriorly in a row at right 

 angles to the sutural plane at the posterior side. Three species. Di- 

 sporous and polysporous. All found in kidney of fresh- water fish. Type 

 species: MitrasjJora cyprini Fujita. 



2. Suh-Order : Sphaerosporea Kudo, 1919. 



Spores spherical or subspherical, with two to four polar capsules. 

 Sporoplasm without iodinophilous vacuole. Vegetative form found in 

 body cavity and tissue. Monosporous, disporous, and polysporous. 

 Parasites of marine and fresh-water fish and amphibia. 



(1) Family: CHLOROMYXID^ Thelohan, 1892. 

 Spores with four polar capsules. Monosporous, disporous, and 

 polysporous. 



