New Taxa of the Genus Euglena (Euglenophyta) from Hubei, China Notes of Spirogyra from Guizhou, China Removal Effect of Two Species of Filamentous Green Algae on Phenol at Low Concentration A New Species of the Genus Spirogyra from Guizhou,China A NEW SPECIES OF SPIROGYRA (CHLOROPHYTA) FROM HEILONGJIANG PROVINCE