A sexual multiplication (schizogony) is only known certainly to occur in a few cases, one being in a Monocystid form, a species of _Gonospora_, which is for a long time intracellular (Caullery and Mesnil [4]), the rest among the _Schizogregarinae_, so named for this reason, in which schizogonous fission takes place regularly during the free, trophic condition. Usually, the body divides up, by a process of multiple fission (fig. 10), into a few (up to eight) daughter-individuals; but in a new genus (_Eleutheroschizon_), Brasil (3) finds that a great number of little merozoites are formed, and a large amount of vacuolated cytoplasm is left over unused.

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