345] 



STUDIES ON MYXOSPORIDIA—KUDO 



107 



Genus MYXIDIUM Biitschli 

 1882 Myxidium Butschli 1882 : PI. 38 



The characters of the genus are described on page 58. 

 Type species: Myxidium lieberkiihni Butschli. 



MYXIDIUM LIEBERKtJHNI Butschli 

 [Figs. 221 to 240] 



lieberkuhni 

 lieberkuhni 

 lieberkuhni 

 lieberkuhni 

 lieberkiihni 

 lieberkuhni 

 lieberkuhni 



lieberkuhni 

 lieberkuhni 

 lieberkuhni 

 lieberkuhni 

 lieberkuhni 

 lieberkuhni 



Habitat: Urinary bladder of Esox lucius L., Lota lota L. (L. vulgaris) \ 

 France, Canada (Georgian Bay), U. S. A., (Wisconsin, Lake Mendota), 

 Italy (Lago Maggiore, Lago di Como, Milano), Germany. 



Vegetative form: Form variable with lobose or immovable filiform 

 pseudopodia. Clear differentiation of protoplasm. Cohn described third 

 layer of protoplasm (mesoplasm). Endoplasm yellowish in older tropho- 

 zoites, contains yellow globules, fat globules and hematoidin crystals. 

 Size varying with age up to a maximum length of 300/i by a breadth of 

 136/x (Butschli). Plasmotomous multiplication active. Cohn described 

 budding of larger forms, while Laveran et Mesnil observed only the division 

 of smaller forms. Each pansporoblast develops into two spores. Poly- 

 sporous. 



Spore: Elongated fusiform. Shell with longitudinal striations. Polar 

 capsule at each end of the spore. The longer axis of polar capsules coincides 

 with that of spore. Dimensions: length 18 to 20/i, width 5 to 6At. Mavor's 

 measurement: polar capsules 5/i by 2.5 to Zn, length of polar filament 

 40 to 45/i. 



