-8occurred in the land forms as a result of the previous tests. The number and kinds of mutations, malformations, and tumerous growths observed on previous field trips have aided in a more complete understanding of the biotic impact of atomic bomb detonations. Resurvey of Bikini During the weapon-testing program at Eniwetok a resurvey of Bikini might be included. If proper timing is arranged the Bikini survey could proceed simultaneously using the monitoring craft usually stationed at Bikini during weapon testing operations at Eniwetok. The collections of material at Bikini should follow a pattern similar to that used in the studies of 1946, 1947, 1948, and 1949. 1. Collections should be made from waters adjacent to Bikini, Amen, Enyu, Erik, Boro, and Namu Islands. 2. The target area and any remaining floats in the target area should be studied. 3. Terrestrial areas at Bikini might be evaluated for long-lived radioactive materials that have been transferred from the lagoon up onto the land. Posttest Survey at Eniwetok Biological monitoring at Eniwetok as soon as feasible following the detonation is essential to: