- 60 - - Physical Decay of Samples Extensions into December 1955 of the nine decay curves of Figures 11, yg and 13, UWFL-42 showlittle change in direction. Gastric mill of a crab began to decay with semi-log linearity and changed between 200 and 300 days post shot to the log-log linearity now apparent in Figure 15. Muscle of a sea cucumber changed similarly. The other decay curves tabu- lated in Appendix Table XII of UWFL-42 have not yet been extended, but approximately straight-line log-log curves may be expected. The more rapid rate of decline (-1.75) than of decay (-1.43) noted earlier (UWFL-42:28) has persisted and is encouraging. It is understandable that decline should exceed decay in an area of high | activity because of dilution by rain and sea. In an area of relatively low activity decay would exceed decline because of additions from the surround-