From a closed pot. The claw and part of the tail(?) of a lion's or leopard's skin. Herakles, or maenads? Relief contours.
ADDENDA (Sept. 2020), according to Agora XXX, closed: shape uncertain. On plaster ... 22 February 1935
Moore, M. B ... American School of Classical Studies at Athens ... This volume presents the inventoried red-figure and white-ground pottery found in the Agora Excavations between 1931 and 1967. Although many of these vases have already been published in various reports ... 1997