538 



PROTOZOOLOGY 



N. notahilis K. (Fig. 258, a-c). In the trophozoite of a myxospori- 

 dian, Sphaerospora polyjyiorpha (p. 525) which inhabits the urinary 

 bladder of Opsanus tau and 0. beta. The host fish remain free from 

 the microsporidian infection. The entire development takes place in 

 the cytoplasm of the host trophozoites. Trophozoites small binu- 

 cleate, multiply by binary fission. Spores ovoid to ellipsoid; sporo- 

 plasm binucleate; fresh spores 2.9-4)u by 1.4-2.5^*; extruded polar 



0-6 oo ^ 



Fig. 258. a-c, Nosema notahilis, X1400 (Kudo), a, a stained trophozoite 

 of Sphaerospora polymorpha, infected by 6 trophozoites of N. notahilis; 

 b, another stained host trophozoite in which 9 spores and 2 trophozoites 

 of N. notahilis occur; c, 8 fresh spores of N. notahilis. d-g, Duboscqia legeri 

 (Kudo), d, mid-intestine of Reticulitermes flavipes, to which are attached 

 an (enlarged) infected and 2 uninfected fat bodies, X57; e, f, mature 

 sporonts containing 16 spores as seen in Hfe, X1530; g, portions of in- 

 fected and normal fat bodies of the termite as seen in a section, X1530. 



filament 45-62yu. When heavily infected, the host myxosporidian 

 trophozoites degenerate and disintegrate. A unique example of hy- 

 perparasitism in which two cnidosporidians are involved. 



