p. 255 - 259 A FEW ASPECTS OF YEARLY DYNAMICS OF PROTEOLYTICAL ACTIVITY FROM SOME BLACK SEA MOLLUSCS Maria Mirza Romanian Marine Research Institute Constanta Abstract We have studied the yearly dynamics of proteolytic activity in the stomach and the hepatopancreas from Mytilus galloprovincialis Lmk, and Rapana thomasiana thomasiana Grosse, in the presence of sea water and at temperatures of the sea environment, whan sampling the marine invertebrates.