and study sites were Rongelap and Kabelle Islands. Soils and vegetation were resampled at previously established plots and new plots were sampled to better delineate soil types. vegetation map of the northern half completed; A of Rongelap Island was also data needed for completion of soil maps of Rongelap and Kabelle Islands were obtained in cooperation with the Trust Territory Agriculturalist. Newly planted coconut groves were treated with different combinations of fertilizers. chemical Invertebrates were collected at most of the is- lands visited. Reef fish were observed and collected primarily at Rongelap and Kabelle Islands, with the emphasis placed on goatfish and organisms upon which they were observed to be feeding. Plankton was collected by continucus pumping at the surface between four-hour eighty-nine stations in the lagoon. collections of at three of the stations. Bottom cores were successfully re- At Kabelle Island the lagoon shore to island soil was studied, with particular attention to the formation the rooting zones of plants. of beach pavement and Twenty-fou--hour rations were obtained from nine adult males at Rongelap Mr. Twenty- plankton were made at three depths covered at seventy-four stations. transition from . Robert Lee, University of Hawaii, Island. accompanied the group for the purpose of making productivity measurements of sea water 9002281