Figure 144. Ophryocystis mesnilt. Isogamous gamete formation and fertilization. A 

 and B, two trophic forms attached to ciliated cells of host; C, gamonts pairing in 

 pseudoconjugation ; D, E, F, two nuclear divisions, probably meiotic; G, mature gamont; 

 H and I, formation of gametes by internal budding; J, K, L, fusion of gametes in 

 fertilization ; M, N, O, divisions of the zygote to form eight sporozoites in the single 

 spore. (After Leger, 1907.) 



