Dredging in some of the deep tidal channels that separate the barrier islands along the Georgia coast revealed a fauna of upper Miocene age. The fauna is representative of the Duplin Marl, which is equivalent to the upper part of the Yorktown Formation of Virginia and to the upper part of the Choctawhatchee Formation of Florida. The outcrop in Sapelo Sound, where most of the fauna was recovered, is estimated from fathmograph records to be 75-90 ft below mean low water. A brief discussion of the area, a faunal list, and a discussion of some species, 3 of which are new, is included.