In the programme of work for the summer of 1906, it was decided by the Director that a series of cruises should be carried out by the Association's steamer Oithona to investigate the fauna of the deeper waters of the English Channel. The bearing S.W. ½ S., Magnetic, = S. 23° W., True,* from the Eddystone Lighthouse was chosen as a baseline, and the work was to be carried out with special reference to points at 10-mile intervals along this bearing. The fauna was to be investigated as fully as possible, and bottom-deposits, particularly stones, were at the same time to be carefully recorded and collected. In all, eight cruises were made, the work being extended nearly as fer as the 50-mile point.