The stratigraphy of the Clarence Series at Cover ham, at the north-east end of the Clarence Valley, eastern Marlborough, is revised. The Wharfe Sandstone, which underlies the “Coverian”, and was previously placed in the Taitai Series, containsInoceramus ipuanus,Inoceramuscf.urius, andAucellinacf.euglyphaand is therefore of Motuan age. Identity of the overlying “Coverian” and Ngaterian is suggested by the occurrence in both of a closely relatedInoceramusspecies. Overseas correlations based on ammonites also support this time equivalence. It is proposed to abandon the “Coverian” as a stage, and to consider the Clarence Series as consisting of three stages: Urutawan (Lower Albian), Motuan (Middle and Upper Albian), and Ngaterian (Cenomanian).