354 



SPOROZOA. 



295. Nosema ctenocephali Kudo. (Fig. 175.) 



■fNosenia pulicis, Korke, 1916, pp. 725-30, pi. Ixiii. 

 Nosema ctenocephali, Kudo, 1924 c, pp. 105-6, pi. v, figs. 178-82 ; 

 Iyengar, 1929, p. 140. 



Spore ova], refractile in fresh state, with one or two vacuolar 

 spaces at the poles, and with an actively mobile sporoplasm. 



S,T. 



Fig. 175. — Stages in the life-cycle of Nosema ctenocephali Kudo. 



A, fully developed sporocyst (c.n., capsulogenous nucleus ; 

 P.C., polar capsule ; p.f., polar filament ; p.n., parietal 

 nucleus ; s., spore ; S.N., spore-nucleus ; s.t., sporocyst) ; 



B, germination with extruded filament, with a planont at 

 its extremity (a, sporocyst ; b, planont ; c, same, highly 

 magnified) ; C, colony of planonts ; D, division of meronts 

 to form a chain-like group ; E, division of meronts 

 to form a cluster ; F, capsule and polar filament (After 

 Korke.) 



