698 Septonema On drifting rocks. filaments about 12µ thick, articles about as long as wide, or a little longer or shorter, heterovagata generally brownish greenish but and diameter as other cells or a little lep. yellow. - Vegetative cells aeruginous bright shrank thin. 699 - Gelatinous matry on drifting Rocks - Gags Ravine - 8-22 containing nostros - calothrix + a multitude of minute green Cells - and peculiar filaments about 20µ in diameter. 700. Charas Water of Twin Lakes Near shore in shallow water, 8-20