SUMMARYOn the basis of further investigation and literature previously unobtainable, the correct names and synonymy of certain palmelloid planktonic green algae is considered to be as follows:1Coenococcus planctonicusKorsh. (Radiococcus planctonicusLund.).2Coenococcus pelagicus(Teil.) comb.nov. (Radiococcus pelagicaTeil.).3Cecidochloris adnata(Korsh.) comb.nov. (Chlorophysema adnataKorsh.;Cecidochloris stichogloeaeSkuja).4Gemellicystis neglectaTeil. non Bourr.(Tetraspora imperfectaKorsh.;Gemellicystis neglectaTeil. sensu Bourrelly (1959);G. lundiiBourr.).5Gemellicystis planctonica(Woronich.) comb.nov. (Pseudosphaerocystis planctonicaWoronich.).6Paulschulziapseudovolvox(Schulz) Skuja (Tetraspora pseudovolvoxSchulz.;T. simplexKorsh.;Bchulziella pseudovolvoxTeil.;Paulschulzia pseudovolvox(Schulz em. Telling)).7Paulschulzia tenera(Korsh.) comb.nov. (Tetraspora teneraKorsh.;T. elegansWoronich.;Paulschulzia elegans(Woronich.) Fott;P. elegans(Woronich.) Lund.).