p. 129 - 136 THE POPULATION STRUCTURE OF ILLEX ILLECEBROSUS ARGENTINUS (CASTELLANOS, 1960) CAUGHT ON THE FALKLAND ISLANDS SHELF Cornelia Maxim Romanian Marine Research Institute Constanta Abstract The paper presents the results of the observations carried out the species Illex illecebrosus argentinus catched in May 1978 in the Falkland Islands vicinity. For samples, the structure on classes of length, weight, sex and stages of maturity was determined, as well as the length-weight key.