ca a, ee - the designation number of the parent sail in order to correlate hatching with Teray doss. Further spaming filled in the spaces bat- ween ogg masses rendering identification dubiois. Difficulty is being encountered in providing sufficient aeration with the mmp availabls, Weekly census of the snails is continuing. During the month the Applied fisheries Laboratory was visited by Dr, Simeon T. Cantrill, Swedish Hospital, Seattle, Washington, Dr. Le R. Donaldson made a trip to Richland, Washington for conference April 27, 1943, with Dr. Shields Warren, Dr. Nerbert Parker, Dr. 5. Gantrill, Dr. Falila, t&. ©. Shugg, Ur. Shaw, “ir. RX. “ageman, ‘ir. W. K. Crane, Hr. Lawis, and Mr. Harris; and to visit the laboratory in the 100-7 area, ed? \ A fy SV rphbame/ tauren 2. Vonaidson, Director ef Contract tio. 1~28094-eng-33 DO®ARCHIVES