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Tetrvxporv gelatinosa (Vauch) Desv., which belong to Tetrasporaceae (Tetrasporales of the Chlorophyceae) is almost cosmopolitan in distribution. The moropholgy and reproduction have been studied by Smith (1950). This family differs from others of the order by the presence of two or more rigid processes, pseudocilia, at the anterior end of the cell. The pseudocilia often project beyond the colonial envelope (Geitler, 1931) and are visible only after staining. The term pseudocilia is unfortunate as these structures are not functional as cilia or flagella; they are motionless and when swarmers (zoospores) are produced, the pseudocilia are sloughed off (Fritsch, 1935).