In the Mémoires de la Délégation en Perse, Vol. I, Plate 16 (repeated in II, 24), there stands among the symbols carved upon a finely-executed and preserved ‘boundary-stone’ one that is at present unique, namely, that in the lower left corner, numbered 22 in subsequent publications. It is true that one other has been compared with it—L. W. King, Babylonian Boundary-Stones, Plate III (at bottom)—but there is really no resemblance here. Dismissing, therefore, the suggestion (most inapparent to the eye, and founded only upon this supposed identity) that a sheaf of corn is the object depicted on top of the divine seat or shrine, the only remaining explanation offered of this thing is that it is a shell, in particular that of the pecten, the comb-shell. While it is not possible to disprove this, several arguments may be brought against it. First, the representation is not much like the thing compared. Three typical pecten-shells, from species which occur particularly in the Persian Gulf, do not show anything like the transverse line following the curved border which is so carefully marked upon the emblem; contrariwise, the sculpture has nothing like the prominent ‘wings’ at the apex of the shells. Next, even the largest of the three shells proffered as specimens, Pecten townsendi Sowerby, is quite small, being about 4 inches in extreme measurement, so that if the object resting upon the ‘seat’ is a pecten-shell it must be many times magnified in the representation.