357] STUDIES ON MYXOSPORIDIA—KUDO 119 



Parisi gave the following dimensions: length 15 to 20ju, width 5 to 6/i, 

 polar capsule 7/i by 4.7/x, length of polar filament 25 to 30jii. 



Davis' measurements are as follows: length 17 to 20/i, breadth 5 to 6/i, 

 length of polar filament 20/i. 



Georgevitch observed young spores with both ends tapering into a 

 point. Later they assume the typical form with truncated ends. He did 

 not recognize the striations on the shell. He also mentions the occurrence 

 of abnormal spores, such as elliptical, spherical forms, etc.; or with only 

 one polar capsule. 



SPHAEROMYXA IMMERSA (Lutz) Thelohan 

 [Figs. 308 to 311] 



1889 Cystodiscus immersus Lutz 1889 : 84-88 



1895 Sphaeromyxa immersa Thelohan 1895 : 343 



1899 Cystodiscus immersus Liihe 1899 : 291-293 



Habitat: Gall-bladder of Bufo marinus L. and Leptodactylus ocellatus 

 L.; Brazil. 



Vegetative form: Leaf-like or disc form, visible thru the bladder wall. 

 Upper and lower sides slightly convex. Size up to 1.5 or 2mm. in diameter; 

 thickness being 1/20 to 1/10 of the diameter. Protoplasm is well differ- 

 entiated. Ectoplasm transparent and membranous, often contains a 

 large number of micrococcus-like bodies. No ameboid movements nor 

 change of form. Endoplasm highly vacuolar, contains fat globules. 

 Plasmotomic multiplication probably occurs. Spores always arranged in 

 pairs. Polysporous. 



Spore: Oval with rounded extremities. Shell more or less thick, with 

 fine transverse striations. Spherical polar capsule at each end. Sutural 

 plane is oblique to the longitudinal axis of the spore. Sporoplasm trans- 

 parent. Dimensions: length 12 to 14/x, breadth 9 to 10/x, length of polar 

 filament 50 to 70/11 (4 to 5 times that of the spore) (KOH). 



SPHAEROMYXA INCURVATA Doflein 



[Figs. 312 to 314] 



1898 Sphaeromyxa incurvaia Doflein 1898 : 286-287 



Habitat : Gall-bladder of Blennius ocellatus ; Napoli. 



Vegetative form: Trophozoites are found in large masses (Plasmodia ?), 

 in which they form a thin, hollow ball, 5-7mm. in diameter. 



As the surface is greater than the inner surface of the bladder, some 

 parts of the body are folded up. Body bluish white and transparent. 

 Protoplasm highly vacuolar, contains numerous fat globules, nuclei and 

 spores. Polysporous. 



Spore : Curved to one side along sutural plane and also in a plane at right 

 angles to it. Polar capsule at each end. Sporoplasm with two nuclei. 



