Yigure 22. Corals found on Bogallua November 8, 1952. (a) Photograph of Acropora (top) and Heliopora (bottom), actual size; autoradiographs of corals shown in (a); (c) enlargement of marked area in (a) - the white nodules were firmly attached to the coral - arrow indicates nodule. te geynes broken open showing hollow nature x-13 ° ~ 95 - TOF PROVES