PROTOZOA 



129 



from a larger parent; sometimes many buds are formed rapidly, one 

 after the other, until the parent protozoon disappears in a swarm of 

 daughter cells. When a protozoon divides at a single division to pro- 

 duce a large number of daughter cells simultaneously, the process is 



FIG. 94. Coccidium schubergi. A-C, asexual multiplication; D-K, sexual multi- 

 plication; D, microgametes; E, macrogamete; F, G, fertilization; H, 7, K, division 

 and spore production. (After Schaiidinn, from Doflein.} 







called schizogony and the young parasites are called merozoites, if a 

 sexual fertilization has not immediately preceded the act of division; 

 if such a division, in which the parent organism disappears, takes place 

 after a fertilizing act, the process is called sporogony and the young 

 parasites are sporozoites. 



