Abstract
Two new species of the dinoflagellate genus Prorocentrum from freshwaters in Tasmania are described from scanning electron microscopy. Prorocentrum playfairi occurs in manifestly fresh waters, some far inland, and in marine coastal waters. Prorocentrum foveolata occurs in fresh coastal lagoons. These species were recorded in Australia 70 years ago by Playfair (1919) who described them under the name of Exuviaella lima.