-113- AECD -3446 g people: Dr. Francis Drouet of the Chicago Natural History Museum. R;, Dr. Lois Eubank of Mills College, Oakland, California. % Dr. Isabelle Abbott of the University of California at Berkeley. Dr. G. J. Hollenberg of Redlands University, Redlands, California. _ Dr. G. F. Papenfuss of the University of California at Berkeley. ‘t Lar ter PIOACTIVITY Radioautographs of Halimeda, Lyngbia, Udotea, Dictyota, Microdictyon ryopsis have been made but are not shownin this report. The frozen algae samples were ashed and counted by the standard procedure ed in an earlier section. After counting, the algae samples were grouped by by species, and by phylogenetic relationship, and the activity of the samples ressed as d/m/g - was tabulated. f In Table2 the average count of all algae samples from the samelocality sted according to descending order of activity. The four areas at the top of t list are in the vicinity of the Eniwetok Shot Islands and are followed by two imples from the Bikini Target Area. The average d/m/g for each species from all areas combined arelisted ;descending order of magnitude in Table 3. This listing indicates that the bre succulent forms contain the highest activity. din low water close to the shore line. These algae as a rule were As an example, Bryopsis was found ng the shore on Engebi Island; it is succulent and had a high activity. The e can be said of Lyngbia, Scytomema, and Hormothamnion, In contrast, the Orallines such asHalimeda, Lithothamnion, and Lithophyllum showed hardly any ictivity even though also found along the shore. Table 2 does not necessarily give a true picture of the algae activity by gcality nor does Table 3 necessarily give a true picture of the algae activity by pecies because all species were not collected in all areas. The range in values fom a common area and the variation in values between species are shownin the abulation below of the activity of the algae samples collected from Engebi, Eberiru, nd Runit Isiands, Eniwetok Atoll: eaiya UNIVE unt. U* MES