The design of this paper, in the first instance, was confined to the description of a remarkable coin, communicated to me, in photograph, a year or two ago, by M. Wold Tiesenbausen, whose comprehensive work on “Les Monnaies des Khalifes Orientaux “ placed him in the front rank of Oriental Numismatists. Subsequently, the owner of the piece, M. le Comte S. Stroganofif, was so good as to risk the dangers of International Postal deliveries, and to send me the original coin itself for more exact and critical scrutiny.