- 13 - A survey of the literature concerning coral reefs and their invertebrate fauna has been made. Emphasis has been placed on papers dealing with ecology and physiology. Growth rates of corals as reported in the literature are difficult to compare because different criteria have been used. However, it is evident from several specimens of Pocillopora sp. which were collected during the 1948 biological resurvey of Bikini that there is a more rapid growth at Bikini--perhaps twice as great--than at other places reported. An effort will be made to obtain more reliable data of this nature at Eniwetok. C. Radiochemical analyses Radiochemical analyses were made of a number of soil samples and biological samples taken at Eniwetok Atoll in November 1952 immediately following the Mike shot. Selective absorption of fission product isotopes by plants and animals collected soon after the shot was not observed. Results of these analyses are tabulated in the Applied Fisheries Laboratory report uwFL-33 ‘1) . Portions of soil from Rojoa, Runit, Rigili, Igurin, and Japtan Islands and contents of the intestines from sea cucumbers taken near Japtan, Rigili, Runit, Aaraanbiru, and Bogallua Islands were analyzed for uranium and plutonium content. It was thought that the contents of sea cucumber intestines could well be used as bottom samples, since it is known that sea cucumbers of that