REPRODUCTION 



147 



Fig. 71. a, macrogamete, and b, microgamete of Volvox aureus, 

 XlOOO (Klein). 



number of sporozoites. Among Myxosporidia, a complete infor- 

 mation as to how the initiation of sporogony is associated with 

 sexual reproduction, is still lacking. Na\dlle, however, states that 



Fig. 72. The life-cycle of Pandorina morum, X400 (Pringsheini). a, b, 

 asexual reproduction; c-m, sexual reproduction. 



