Thirty-four core samples from the Commonwealth subsidized Frome-Broken Hill Co. Pty Ltd Flaxman's Hill No.1 well, Otway Basin, Victoria, provided spores identifying the Cretaceous age of the Otway Group penetrated in the well. Microplankton, spores and pollens which might form the basis of future correlation of the Upper Cretaceous of the basin, following comparison with their distribution in Port Campbell No.1 well and Belfast No.4 bore, are noted. Cretaceous outcrop samples from the Otway Group were also examined. Problems arising from tentative correlations between the Lower Cretaceous Merino Group and the Otway Group and the relation of subsurface and outcrop Wangerrip Group are outlined, but no solutions to them are offered at this stage.