646 



PROTOZOOLOGY 



pansporoblast (j) which develops into 2 spores (k, I). Sporoplasm 

 shows first 2 nuclei (/), but later 4 (ra>), of which 2 degenerate (n) and 

 the other 2 fuse into one nucleus (o). On the other hand, according to 

 Naville(1930) a uninucleate amoebula (Fig. 277, a) enters the gall 

 bladder and develops into multinucleate trophozoite in which nuclear 



a b 



c 



Fig. 276. The development of Sphaeromyxa sabrazesi (Debaisieux). 

 a, vegetative nuclei; b, association of two vegetative nuclei; c, the same 

 within a cell; d, primary propagative cell; e, its division; f, secondary 

 propagative cells; g, their division; h, formation of sporocyte; i, two 

 sporocytes; j, formation of pansporoblast; k, pansporoblast at later stages; 

 1, pansporoblast with two spores, the sporoplasm of which contains two 

 nuclei; m, four nuclei in sporoplasm; n, two nuclei remain functional, the 

 other two degenerate, o, fusion of the two nuclei. 



