The life cycle of several clones of Phaeoschizochlamys mucosa, Tetrachrysis minor spec, nov., and Chrysosphaera botryoides spec, nov, is described. Zoids were found to occur in the life cycle of Phaeoschizochlamys; as a consequence, this genus is removed from the subclass Acontochrysophycidae to the Heterochrysophycidae, order Chromulinales. The new Tetrachrysis species differs from the type species in this genus in mode of cell division and its copious mucilage investment; its systematic position is discussed. The new Chrysosphaera 1 species differs from other algae in this genus in that it has Ochromonas-like zoids instead of the Chromulina type described for the genus Chrysosphaera.