TABLE 1. Atolls and islands where marine and terrestrial samples were collected in the Northern Marshall Islands survey. Atoll or Number of Survey island islands days FIRST LEG Field Days: September 18, 1978 to October 6, 1978 Rongelap 9 7 Taka 3 1 Utirik 3 4 Bikar 3 1 Rongerik 6 2 Ailinginae 9 _3 TOTAL 32 18 SECOND LEG Field Days: October 13, 1978 to October 28, 1978 Likiep 7 4 Jemo 1 1 Ailuk 8 4 Mejit 1 1 Wotho 3 _2 20 12 TOTAL THIRD LEG Field Days: November 2, 1978 to November 16,1978 Ujelang 8 2 Bikini 14 8 Enewetak 2 tt TOTAL 24 21 11