Page Figure 20. Photograph of the eleven samples shown in Figure 19 91 Figure 21. Autoradiograph of algae —«93 Figure 22. Corals showing white nodules of high specific activity 95 Figure 23. (a)Autoradiograph of goatfish showing radioactivity in gills; (b) of fish in (a) Photograph Figure 24. (a)Composite photograph of fish used. for autoradiograph (b) | Figure 25. (a)Photograph of land plants used for autoradiograph (b) 97 98-99 100 4m