‘Chloride Cells’ in the Gills of Fresh-Water Teleosts

摘要: Specialized cells of several kinds, namely, ( a ) mucous-gland cells, b large bi- or tria nucleate glandular and c mast occur in the gills some species freshwater teleosts. The typical ‘goblet’ type mucous glands are present number species, such as Catla catla, Labeo rohita, Ophiocephalus punctatus , Mastacembalus armatus . In catla these respond to ‘chloride testy’. This indicates that, besides discharging mucus, they also play part elimination chloride. punctatus, Clarias batrachus, Heteropneustes fossilis only give positive reaction with AgNO 3 /HNO test for may mean that few them state active secretion chlorides, while others non-secretory phase. Large eosinophil 2 nuclei occur, chiefly siluroids. function hypertrophied multicellular is not clear. Judged by test, possesses highest chloride cells. Hilsa ilisha, Rita rita, striatus ‘network silver’ exists on surface primary secondary lamellae. cells’ said be characteristic marine fishes which an extrarenal mechanism excess salts from body fluid necessary correct osmo-regulation. These make their appearance fresh-water have been experimentally subjected saline medium. presence occurrence living natural habitat is, therefore, interesting. discovery actively secreting certain teleosts mucoid nature new results reported here.