PLATE 5 



EXPLANATION OF FIGURES 



Nosema beatis nov. spec. 



75 A schizont. S.G. X 2360. 



76 to 93 Sehizonts in various stages of binaiy fission. S.G. X 2360. 

 94 to 103 Development of spore. S.G. X 2360. 



104 A young spore. S.H. X 2360. 



105 A young spore. S.G. X 2360. 



106 An optical section of a young spore. S.H. X 2360. 



107 A mature spore. S.H. X 2360. 



108 A mature spore. S.G. X 2360. 



109 to 112 Spores. Sm.P.F. X 2360. 



113 A spore with the extruded polar filament. Sm.P.F. X 1180. 



114 A spore with partly extruded filament. Sm.P.F. X 2360. 



115 A portion of the adipose tissue of a normal nymph. S.G. X 1500. 



116 A hypertrophied nucleus of the heavily infected adipose cell of Baetis 



nymph. S.G. X 1500. 



117 A hypertrojihiod nucleus undergoing amitosis. S.G. X 1500. 



192 



