Locality: Island. Personnel: Bikini Atoll, Enyu Date: Aug. 15, Saturday. Same 14. Weather: 1964, Hot. Water conditions: Flat calm. Radiation level(s): McClin~-Maximum average radiation level was 0.03 mr/hr at ground level for total B-y radiation. Beautiful sunrise with Bikini Atoll on the port side. cial arrival at Bikini 07.42, 15 Aug. 1964. Offi- Anchored 100 yards off Enyu Island at 08.01. Brief staff meeting and then on shore for collecting--everything came back on board, including glass balls. Fish collection was made on the lagoon side about the mid- dle of the island. of species that Lewis: Two sacks of fish were picked up. A number live in the surf were obtained. plankton sampling. Two exploratory 15 minute tows, one near the surface and one at 25 meters depth, were made a few miles west of Enyu Island, just inside the entrace sill. Indication is that surface tows will yield sufficient amounts of lagoon plankton for analysis. Bonham--invertebrates on the lagoon side were mostly Grapsus (3 collected) and hermit crabs. On the ocean side reef Holothuria atra were abundant, about 1 every 5 sq. feet over most of the 1/5 to 4/5 of the way to the outer edge. Over appreciable portions of this area there were 1 or more per sq. ft. was more than 1/10 this abundant, H. leucospilota and Actinopyga mauritiana were