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The Present paper deals with taxa of genus Stigeoclonium which includes 22 genera 24 species and 3 varities. Of these Stigeoclonium farctum Berthold, Stigeoclonium longipilum Kuetz, Stigeoclonium variable Naegili, Stigeoclonium fascicularis Kuetz and Stigeoclonium pachydermum Prescott have been reported for the first time from Bihar lake, they constitute new record for the area.

Total of 14 genera 16 species and 3 varieties of Pithophora species were reported. Of these Pithophora roetelleri Agardh, Pithophora sumatrana Mart, Pithophora varia Willie, Pithophora cleveana Wittrock and Pithophora aequalis Zonard are first time reported from the Tarai region. They constitute new record for the area.

The present paper deals with the algal distribution and organic pollution in fifteen rural and temple ponds in Balrampur. Algae belonging to Chlorophyceae, Cyanophyceae, Euglenophyceae and Bacillariophyceae were studied. Occurrence of Microcystis aeruginosa was observed in many ponds. Among the ponds studied one pond showed confirm high organic pollution, five ponds moderate organic pollution, five probable high organic pollution and four ponds no organic pollution.