381] STUDIES ON MYXOSPORIDJA—KUDO 143 



Spore: Broadly elliptic; shell bivalve; valves equally convex. Sutural 

 ridge. Two equal polar capsules. Sporoplasm with a vacuole. Dimen- 

 sions: length 14/x, breadth lO/i, thickness 5/i. 



Remarks: This species seems to be very similar to M. carassii Kloka- 

 cewa (page 150). 



MYXOBOLUS sp. Gurley 

 [Figs. 426 to 429] 



Habitat: Skin of opercle, in the branchiae, on the head or on the fin of 

 Lucioperca lucioperca L. ; Germany, Don. 



Vegetative form: Cysts 1.09 to 2.18mm. in diameter. Color whitish. 

 Polysporous. 



Spore: Rounded. Thickness equal to half the breadth. Sutural ridge. 

 Two polar capsules, of equal size, converging. 



MYXOBOLUS CYPRINI Doflein 

 [Figs. 430 to 432] 



1896 Hofer 1896 : 2, 38-39 



1898 Myxobolus cyprini Doflein 1898 : 288, 320, 325 



1904 Myxobolus cyprini Hofer 1904 : 66-67 



1909 Myxobolus cyprini Doflein 1909 : 780-783 



1916 Myxobolus cyprini Doflein 1916 : 1026-1027 



Habitat: Suppurative connective tissue and epithelium of kidney, 

 liver and spleen of Cyprinus carpio L., rarely Tinea vulgaris Cuv. and 

 Ahramis brama L.; Germany, Austria. According to Hofer the parasites 

 cause so-called "small pox of carp" among carp in German waters. 



Vegetative form: Small ameboid. Form irregular. The youngest 

 form with a single or many nuclei, is found in the epithelium of the kidney. 

 Multiplication by multiple division, the nuclei undergoing amitotic 

 division. Endoplasm contains homogeneous, yellow and refractive bodies. 

 Also found in the state of dififuse infiltration. Spores are found in the 

 parenchym of the kidney. 



Spore: Oval. Shell thickened (1.5/i wide) along the sutural edge. 

 Two converging polar capsules cross each other, in front view, at the 

 anterior tip. Sporoplasm with an iodinophilous vacuole. Dimensions: 

 length 21/x, breadth 15ju, length of polar capsule 6n. Doflein (1916:1027) 

 gives the following dimensions: length 10 to 16)u, breadth 8 to 9ju. 



Hofer gives the following dimensions: length 10 to 12jLt (up to 16;u), 

 breadth 8 to 11/z, polar capsule 5 to 6^i by 3/i, sutural edge 1.5/i. 



