Abstract
Photographic and descr. evidence is given of an alternation of generations from cultures of 3 genera of foraminifera, Patellina corrugata*, Spirillina vivipara*, and Discorbis patelliformis*. The megalo-spheric tests fuse in groups of 2 or more prior to sexual reproduction. Eight genera are listed in which multiple tests have been reported. In P. corrugata all nuclei were the result of a previous mitotic division.

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