The present communication was carried out with morpho-taxonomic descriptions of four bacillariophycean algal taxa belonging to the order pennales of the class bacillariophyceae namely Fragilaria virescens Ralfs, Cymbella turgida (Greg.) Cleve, Gyrosigma attenuatum (Kütz.) Rabenh and Nitzschia alpina (Näg.) Hustedt. Among them, Nitzschia alpina (Näg.) Hustedt within the family, Nitzschiaceae Fragilaria virescens Ralfs included to the family Fragilariaceae, Cymbella turgida (Greg.) Cleve and

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... igma attenuatum (Kütz.) Rabenh. to the family Naviculaceae. During taxonomic survey these algal species were collected from Hooghly district of West Bengal. All the algal species belonging to bacillariophyceae except Fragilaria virescens Ralfs were collected as brownish suspended or precipitated forms from water bodies. The physicochemical parameters that favours the algal growth in different water bodies were recorded and found to be congenial for the growth of different members of bacillariophyceae. All four taxa stated above are new reports from the state of West Bengal, India.