375] . STUDIES ON MYXOSPORJDIA— KUDO 137 



Habitat: Branchiae of Ahramis brama L. and Chondrostoma nasus L., 

 wall of stomach, pyloric coecum and intestine, branchiae, spleen, kidney of 

 Mugil chelo Cuv., M. capita Cuv. and M. auratus Riss.; Le Vivier-sur-mer, 

 Banyuls, Marseille, Heidelberg, Pregel, Frisches Haff, Kurisches HafiF, 

 Geneva, Napoli. 



Vegetative form: No description by Thelohan. 



Wegener writes as follows: 



Cysts of variable size. Color white. Usually small and narrow, 0.5 

 to 0.7mm. long and 0.2mm. wide. Frequently large round cysts of 1.2 to 

 1.5mm. in diameter, filling the lamella. Cysts are surrounded by 10 to 

 1 l/i thick membrane composed of the connective tissue of the host. Ecto- 

 plasm, 5/x thick, is faintly stained by hematoxylin. Outer region of endo- 

 plasm, alveolar and densely loaded with nuclei, while in the central portion 

 with mature spores in granular ground-mass. 



Parisi's observations are as follows: 



Cysts in the intestinal wall of Mugil auratus, large; reaching a length 

 of 3mm. 



Spore: Thelohan's description is as follows: 



Flattened ovoidal, with more or less attenuated anterior end. Sutural 

 edge shows fairly noticeable folds. A small triangular intercapsular appen- 

 dix. Vacuole in the sporoplasm is usually hard to stain with iodine. 

 Dimensions: length 8 to 9^i, breadth 6 to In, length of polar filament 

 15/i (KOH). 



Wegener observed as follows: Rounded with slightly pointed anterior 

 end. Length 8 to 9. 5/x, breadth 6 to 7.5ju, polar capsule 4.5/i by 2 to 3/i. 

 Shell exhibits small folds around the sporoplasm. An intercapsular triangu- 

 lar body indistinctly visible. 



Parisi gave the following dimensions: length 8 to 8.5ju, breadth 6 to 7/i, 

 thickness 5.5m, polar capsule 3 to An by 1.5 to 2ju, length of polar filament 

 30ybt (alkaline). Folds usually 6 in number. Coiled polar filament visible 



Habitat: Fin (subcutaneous tissue), spleen, kidney and liver of Gobio 

 gobio L.; branchiae of Alburnus lucidus Heck., Cyprinus carpio L., Blicca 

 bjorkna L., Abramis brama L. and A. vimba L. ; France (Isere), Frisches 

 HafiF (especially spring months), Switzerland. 



