O. gibba. Pec. radiis 20 glabris, gibbus.
Brown's drawing was not quoted.
O. flavicans. Pec. radiis 8 striatis, margine altero rotundato.
As in the 'Systema,' the next two shells, along with this, formed a group distinguished as having the "Valvulis altero latere magis gibbis." No names had been appended to this, the three preceding, and the two following species.
O. fasciata. Pec. radiis 20, auriculis æqualibus exoletis.
The "gibba" of the borrowed diagnosis was not, it may be observed, in the original.
O. lima. Pec. radiis 22, imbricatis squamis, altero margine rotundato, auriculis obliteratis.
The "gibba" of the borrowed heading was not in the original diagnosis. The final remark was likewise absent.
O. isognomon. The entire account of this species was added to the copy in the Linnean handwriting. "Klein, 128. t. 8. f. 15. Isognomon" and "Cardo ut ephippo" had been omitted in printing.
O. malleus. O. trilobum.