EXPLANATION OF PLATE XL 



ITxo, I. — Gill of Laheo rnhita with cysts of Myxoholus rohitae on the 

 filaments. 

 2-4. — Propaoative cells of M. roJdtae. 

 5-9. — Division of propagative cells. 

 10 and IL — Union of a micro- and macro-gametes. 



12-20, — Division of the micro- and macro-gametes, and the forma- 

 tion of the pan-sporoblast. 

 21-22. — Division of the pan-sporoblast into two sporoblast. 

 23-25. — Young spores in development. 

 26. — Mature spore showing the structure. 

 27. — Spore with the polar filament extruded. 



28. — A portion of the caudal fin of Laheo rohita with a cyst of 



Myxoholus seni. 



29-31. — Mature spores of M. seni. 



32-33. — Side views of two specimens of Rashora danicoivius show- 

 ing cysts of Myxoholus nodularis. 



34-36. — Mature sjjores of M. nodularis. 



