176 ILLINOIS BIOLOGICAL MONOGRAPHS [414 



Gen. et spec, incert. Mingazzini 



1892 Mingazzini 1892 : 398 



1899 Labbe 1899 : 113 



Habitat: Ovarian egg of Lacerta sp. 



Vegetative form: Ameboid with hyaline pseudopodia and granular 

 protoplasm. 



Spore: Not observed. 



Gen. et spec, incert. Nufer 

 1905 Myxobolus sp. Nufer 1905 : 71, 77, 79, 85, 186 



Habitat: In the connective tissue of branchia of Chondrostoma nasus; 

 Lake of Lucerne. A single cyst in a single host fish. 



Vegetative form: Cyst white, and of 1mm. in diameter. 



Spore: With two polar capsules at one pole and the sporoplasm. 

 Dimensions or any other characters are not given. 



Remarks: Altho Nufer placed the form in the genus Myxobolus, this 

 must be brought into the present group in view of the fact that the iodin- 

 ophilous vacuole was not detected, and that the observation is too incom- 

 plete to place it to any one of the genera. 



Habitat: Gall-bladder of Urophycis chuss; St. Andrews (July to Sep- 

 tember). 



Vegetative form: Mavor writes as follows: 



Attached, usually in large numbers, to the epithelium of the bladder, 

 occurs a spherical or ellipsoidal trophozoite which in stained preparations 

 is found to contain numerous nuclei. Very often clusters of Ceratomyxa 

 acadiensis are found adhering to the free surface of myxosporidium. In 

 fresh preparations the appearance is that of budding from a parent organ- 

 ism. An examination of sections has shown a sharp division between the 

 myxosporidium and Ceratomyxa acadiensis. 



Spore: Not found. 



Remarks: Mavor supposed that the form under discussion probably 

 was some species of Myxidium or Chloromyxum. 



Gen. et spec, incert. Mavor 

 [Figs. 588 and 589] 

 1916 Mavor 1916a : 68-69 



Habitat: Urinary bladder of Stizostedion vitreum Mitch.; Georgian 

 Bay (Canada). 



