160° & 167°R 14H 14° x 38 3 4 5 6 9 39-336 2 7 8 11 n606« 18 37 1 le 15 1g 22 32 , 35 ° QO " niwetok , 0 10°N 160° ‘<> 4° Bikini 33 34 13 14 20 Pi 29 28 27 26 25 eu oS* Fig. 1. Ujelang Atoll Rongelap Atoll CS = Atoll Atoll 31 nO)|8—s«—17 * ‘ 33 ‘ Chart of the Collett plankton stations, 10 167° O N