 Again, this would be a reference to the tranquility afforded by the protection, fidelity, and valor of the Roman army.There is a dissenting opinion, that being that the animal held in Tranquillitas's hand is not a dragon, but rather a capricornus, which would tie in with the maritime theme of the transportation of Egypt's grain harvest across the Mediterranean to Rome.The capricornus was a marvelous animal with the forequarter of a goat with prominent horns and the hindquarter terminating in the tail of a fish, said in mythology to be a manifestation of Pan.