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DIVUS AUGUSTUS. 269The conjunction of memorial portraits of Augustusand Agrippa involves no anachronism, and, since bothpersonages were extensively commemorated on coinsstruck under Tiberius, there isnothing improbable infinding the double commemoration on a coin of thisperiod.The portrait of Agrippa issimilar to that shown onhis well-known asses with the reverse type of Neptune(Coh., Ag. 3), which are assigned by Cohen to theperiod 27-12 B.C., but by Laffranchi to the reign ofCaligula.It seems rather a digression from the subject of thispaper to enter into the question of the date of Agrippa'sasses at any length but, since the memorial coin we;are considering is obviously connected with the othercoins of Agrippa, the main points for fixing their datemay be outlined briefly as follows :(1) The style of the asses (Neptune type), notablywith respect to the bold treatment of the portrait andsquare form of lettering, is clearly not that of theAugustan period, but exactly corresponds with that ofthe coins struck between A.D. 22 and 41. At the outset,therefore, we must abandon Cohen's date, and thechoice lies between the reign of Caligula and the latterpart of that of Tiberius.(2) The reign of Caligula seems too short a periodfor so vast an issue of coins, since these asses are, asevery collector knows, amongst the commonest coinsof the first century.(3) Cohen enumerates three varieties of Agrippa'sasses which bear the Tribunician dates of Tiberius, viz.XXIII (=A.D. 21), XXIIII ( = A.D. 22-31),and XXXVIII(=A.D. 36). This being so, it seems reasonable to