Thirty-nine taxa of naked Euglenophyta, sampled in Chunam reservoir of Changwon, Keung Nam Province, South Korea, 9 belonging to the genera Euglena EHR., 11 to Lepocinclis PERTY and 19 to Phacus DUJ., have been determinated. Besides some taxa were examined by scanning electron microscopy (SEM). On the basis of these observations two new varieties are proposed, Lepocinclis caudata var. minor and Lepocinclis ovum var. excavata. Details of the pellicle ultrastructure are illustrated.