RACIOBIOLOGICAL STUDIES OF THE FISH COLLECTED AT RONGE1.AP AND AILINGINAE ATOLLS JULY 1957 wae Introduction During July 1957 collections of fish for radiobiological analysts were made at Ailinginae and Rongelap Atoils. The data from these collections represent part of the information from a continuing program of radiobiological studies which was begun on March 26, 1954, soon after the first radiological contamination of Rongelap and Ailinginae Atolls. Subsequent collections were made on July 16, 1954, January 29, 1955, and October 10, 1955 All of these investigations have been reported by Donaldson, etal. (1955). Data from the investigations in the Rongelap area by this our Laboratory and other organizations have been summarized and coordinated by Dunning (1957). ‘ORRee Oe Neda collected August 3, Results of the analyses of additional material 1956 are included in this report. _Materials and Methods Fish were collected at Enibuk Island, by poisoning an area of the inner reef by hook and iine in Mogiri Pass Ailinginae Atoll, on July 11, Ome large grouper also was On July 17, 1957, 1957. taken a collection was made in the lagoon in front of the village on Rongelap Island, Rongelap Atoll, and