112 ILLINOIS BIOLOGICAL MONOGRAPHS [350 



Spore: Very broad compared with the length. The longitudinal axis 

 is curved in S shape. Polar capsule situated in opposite way at each end 

 of the spore. Dimensions: length 20.8 to 23.4/i, breadth 13 to 15.6jw, 

 polar capsules 7.8/i, length of polar filament 90 to lOOju (KOH*). 



Habitat: Gall-bladder of Gadus virens L., G. aeglefinis, G. merlangus, 

 Pleuronectes platessa and Sebastes viviparus, Melanogrammus aeglefinis', 

 Norway (Bergen), Canada (St. Andrew, July to September). 



Vegetative form: Rounded or elongated, as the result of formation of 

 various pseudopodia. Trophozoites partly free, partly attached to the 

 epithelium of the bladder. Size up to 54ju in diameter. Pseudopodia of 

 two kinds: lobose and long filose, sometimes slightly branched. Mavor 

 observed a cyst-like stage under certain conditions, which, he thinks, may 

 be due to some exceptional conditions of the parasite. Plasmogamy. 

 ^Monosporous, disporous and polysporous. 



Spore: Fusiform. Main axis curved into S shape. Form, roughly 

 speaking, very much similar to that of M. sphaericum Thel. Dimensions: 

 length 16.2 to \9n, breadth 7 to 9ix, length of polar capsules 5.4)u, length 

 of polar filament about three times as that of spore. 



MYXIDIUM PROCERUM Auerbach 



[Fig. 268] 



1910 Myxidium procerum Auerbach 1910 : 61-62 



1910 Myxidium procerum Auerbach 1910c : 172-173 



1912 Myxidium procerum Auerbach 1912 : 4, 39 



Habitat: Gall-bladder of Argentina silus As.; Bergen. 



Vegetative form: Not observed. 



Spore: Greatly elongated and narrow. Sporoplasm with one or two 

 nuclei. Dimensions: length 21.6 to 25.2^t, breadth 3.6 to 4/i, length of 

 polar capsule 7.2;u. 



MYXIDIUM MACKIEI Bosanquet 

 , [Figs. 269 to 271] 



1910 Myxidium mackiei Bosanquet 1910 : 436-438 



Habitat: Renal tubules of kidney of Trionyx ganzeticus] Bombay. 

 Observations on three slides. 



