Summary: THE report of the British delegates just received shows that the last meeting of the International Council for the Exploration of the Sea, held in Copenhagen on September 1-4, was, though short, an important one in the Council's history, for at this meeting the machinery of the Council, which had grown rather cumbrous, was thoroughly overhauled and in a considerable measure replaced and renewed, in accordance with a plan prepared by the president, Mr. H. G. Maurice, with the help of Prof. Johan Hjort. To take the less important changes first: the main Committees of the Council are now formed on a regional basis, instead of being based partly upon eographical areas and partly upon the species of sh studied. The regional committees which came into being after the War proved to be a very con venient and practical means of getting co-ordinated researches carried out, and the logical step has now been taken of arranging all the main researches of the Council on this regional basis. The “Area Committees” now formed are seven in number- for the North-Eastern Area (the Norwegian Sea east of the 1000-metre line), the North-Western (Rockall, Faeroe and Iceland), the Atlantic Slope (Rockall to Morocco), the Northern North Sea, the Southern North Sea, and two committees for the Skagerrak, Cattegat and Baltic area. In addition, the Statistical, Hydrographical, Plankton and Limnological Com mittees remain in being.