381] STUDIES ON MYXOSPORIDIA—KUDO 143 



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

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

 sions: length 14/i, breadth lO/i, thickness Six. 



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

 6ewa (page 150). 



MYXOBOLUS sp. Gurley 

 [Figs. 426 to 429] 



1841 MiiUer 1841 : 480 



1894 Myxobolus sp. Gurley 1894 : 240-241 



1899 Myxobolus sp. Labb6 1899 : 100 



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 haK 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 

 Abramis 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 diffuse infiltration. Spores are found in the 

 parenchym of the kidney. 



Spore: Oval. Shell thickened (1.5)li 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 21m, breadth ISjj., length of polar capsule 6^i. Doflein (1916:1027) 

 gives the following dimensions: length 10 to 16/x, breadth 8 to 9/i. 



Hofer gives the following dimensions: length 10 to \2n (up to 16/i), 

 breadth 8 to \\n, polar capsule 5 to 6m by Zn, sutural edge LSju. 



