114 



SPOROZOA. 



nucleus undergoes repeated division and the schizont divides 

 into a corresponding number of merozoites, which are set 

 free within the lumen of the organ. Each merozoite infects 

 another cell. After several such generations the merozoites 

 develop within the cell into micro- and macrogametocytes. 



Leger (1911) divided the suborder into three famihes, 

 Hsemogregarinidse, LegerelUdae, and Adeleidse, on the basis 

 of the number of sporocysts and contained sporozoites. 

 Reichenow (1921 and 1929) grouped all the genera in a single 

 family, Adeleidae Leger, emend. Noller (1928), after con- 

 sideration of the various schemes proposed, is in favour of 



Fig. 44. — Stages in the life-cycle of Adelina dimidata, a typical member 

 of the suborder. ( x 1700.) A, association of macroga- 

 metocyte and microgametocyte ; B, nuclear division in 

 microgametocyte and formation of gametic nuclei ; C, sporo- 

 cyst with two sporozoites. (From Wenyon, after Schellack.) 



employing Leger's system, as a matter of practical con- 

 venience, until a generally recognized natural system can 

 be adopted. 



Followiag Kudo (1931), the suborder is here divided into 

 two families, Adeleidse and Hsemogregarinidse, which corre- 

 spond to the two suborders of similar name of Wenyon 

 (1926). 



