Abstract
Differential blood cell counts were made onOphicephalus striatus, Ophicephalus punctatus, Clarias magur andHeteropneustes fossilis, airbreathing fishes of freshwaters of India. Erythrocyte counts were made with a Neubauer Hemocytometer. Mature erythrocytes were also measured and their range, mean length and width were obtained in microns for each fish species. The first 100 corpuscles of leucocytic series seen on each slide were counted and listed under the following categories, thrombocytes, large and small lymphocytes and any of the three types of granulocytes namely, eosinophils, neutrophils and basophils. The range and mean percentages for each white corpuscle were calculated for each species. Not a single basophil was found in the whole study. Large lymphocytes were found in each species with the exception ofO. striatus. Differences were observed in the various values for blood cell counts in the four species. Photomicrographs were made forC. magur andO. striatus representing all types of cells.
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