CIMRM 274 - Two side-pieces of a tauroctony. Mithraeum of the "Planta Pedis", Ostia, Italy.
These two items are held in the Ostia museum, where they are unlabelled. However they stand next to the Mithras exhibits. They seem to be portions of a small tauroctony. One is Sol, with his rayed crown, the other is Luna.
Casts of the two are in position at the Mithraeum itself.