Dunning (1957). Collections of marine organisms for radio- biological analyses following the Redwing The 1956 also were made in the western Pacific (1956) and Hardtack (1958) test series. collection was Foundation at Saipan, made by the Guam, Ulithi, George Vanderbilt Yap and Palau and was sent to the Hanford Atomic Products Operation laboratories for analysis. (1958). The results have been published by Thomas et al. Following Hardtack the made six collections George Vanderbilt Foundation (at three-month intervals) Palau and the Gulf of Siam. at Guam, These collections were sent to the Laboratory of Radiation Biology for analysis. There was also another sampling program for radiobiological analyses made at the time of Hardtack. A series of col- lections of tuna and Indian from the western Pacific Oceans were made by the Japanese. One-half of the samples, which were obtained at the port of landing in Japan, were sent to the Laboratory of Radiation Biology for analysis. The analyses made by the National Institute of Health, have been reported by Kawabata (1960). Tokyo, DOE ARCHIVES The present report will be confined to the results of the studies made at the ten one test site island encompasses "off-site" islands and the shown in Figure l, during a period which three nuclear testing programs at the Eniwetok y