277 Ete, ae thus received lesser amounts of fallout debris than some of the other islands. The relative locations of the islands of Bikini Atoll and the test sites are shown in Figure 1 with the number of tests indicated in the circle. Radiological Surveys. An assessment of the impact of test activities on the environment at Bikini Atoll was begun shortly after the first two detonations were conducted in 1946. Survey teams have revisited the atoll between testing periods and since testing was concluded to obtain samples of marine life, land plants and animals, soil, water and to spot-check the external radiation levels within the atoll. The most recent surveys were conducted in 1964, 1967, and during cleanup operations in 1969. 1964 Survey. The Division of Biology and Medicine, through its con- tractors, conducted a field survey of the Eniwetok-Bikini Atolls during August of 1964. Ten scientists from the University of Washington, Bowling Green University, and Puerto Rico Nuclear Center, led by Dr. Lauren R. Donaldson of the University of Washington spent two and one half weeks in Eniwetok Atoll, ten days in Bikini Atoll, and two and one-half days at Rongelap Atoli. The purpose of this survey was to assess, in reconnaissance fashion, the conditions with respect to the effects of nuclear tests and related fallout at these islands. This visit to Bikini Atoll produced a sizeable quantity of data on the -_ fxfe als