373] STUDIES ON MYXOSPORJDAJ—KUDO 135 



Cepede observed one cyst, about 2mm. in diameter, in the connective 

 tissue of the third gill arch. 



Spore: Thelohan described as follows: Ovoidal. Sutural edge shows 

 folds. A small triangular intercapsular appendix. Dimensions: length 

 12/x, breadth lO/x. Cepede's form showed exactly the same dimensions. 



Keysselitz gave the characters of the spore as follows: 



Flattened oval. Shell smooth. A small intercapsular appendix. 

 Sutural edge having a number of small flat enlargement, size and number 

 being variable. Two convergent narrow canals (foramina) penetrate the 

 shell at the anterior end. Two polar capsules, pyriform and of equal or 

 nearly equal size, are located at the anterior half. Coiled polar filament 

 distinct, coiled 7 to 8 times. No distinct connection between polar 

 capsule and the filament. Sporoplasm fills the posterior half of the spore, 

 extending into intercapsular cavity. It is finely reticular, exhibits one or 

 two rounded or oval vesicular nuclei and an iodinophilous vacuole. Fat- 

 like substance is often seen around the polar capsules. Spores kept in water 

 for four months remain intact in large numbers. Dimensions: length 12 

 to 12.5/i, breadth 10 to 10.5^, length of polar capsule, 5.5 to -6^, length 

 of polar filament 28 to 34/i. 



MYXOBOLUS INAEQUALIS Gurley 

 [Fig. 411] 



1841 - MuUer 1841 : 487-488 



1893 Myxobolus inaequalis Gurley 1893 : 414 



1894 Myxobolus inaequalis Gurley 1894 : 212 



Habitat: In the skin of the head of Piramutana blochi Cuv. et Vil. and 

 Synodontis schall Bl. Schn.; Guiana, Surinam. 



Vegetative form: Very small pustules in the skin of the head. 



Spore: Ovoidal. Two polar capsules of unequal size at the anterior 

 end. Dimensions: length 0.0052'", breadth 0.0033'". 



MYXOBOLUS DISPAR Thelohan 

 [Fig. 386] 



1895 Myxobolus dispar Thelohan 1895 : 348 

 1904 Myxobolus dispar Hofer 1904 : 50 



1910 Myxobolus dispar Wegener 1910 : 73-74 



1911 Myxobolus dispar Nemeczek 1911 : 145 



Habitat: Branchiae of Carassius carassius L., branchiae and epithelium 

 of intestine of Cyprinus carpio L., also muscle and spleen of Scardinius 

 erythrophthalmus L. and in the skin and the connective tissue of Alburnus 

 lucidus Heck.; France, Austria, Konigsburg (March, July, September). 



Vegetative form: Not described by Thelohan. 



Wegener's description is as follows: Cysts: white in color; spindle shape 

 with pointed ends. Cysts in Carassius carassius L. smaller and oval. 



