| Abstract: | The freshwater pondsnail Viviparus bengalensis (LINNAEUS) was exposed to sublethal concentrations of pentachlorophenol (1.561 mg/l) and sodium pentachlorophenate (0.991 mg/l). Both the chemicals caused considerable damage in the mantle of the snail. Their toxic effects included shrinkage and elongation of epithelial cells, the cells losing contact with each other, resulting in the formation of intercellular spaces, enlargement of nuclei, shrinkage of the basement layer and loss of shape of polygonal cells of connective tissue. |
