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New Zealand specimens of fossil shark teeth referable to Carcbarod on m egalodon (Agassiz) are discussed, including the first examples from the North Island. Previously published records are reviewed and revised, and the stratigraphic distribution of this species discussed. The New Zealand records of C. megalodon, which begin in the Lower Oligocene, provide some of the earliest world records for this species. Stratigraphie distribution of the two related species, C. aurictilatus Blainville, and C. carcharias (Linnaeus) is also examined.

Specimens of a ganopristine sawfish, identified as Oncbopristis dunklei praecursor Thurmond, have been recognised in rocks of Piripauan-Haumurian age (CampanianMaastrichtian) from two New Zealand localities. Oncboprisris is a genus previously known only from the northern hemisphere. The New Zealand occurrences constitute not only the first record of the genus in the southern hemisphere, but also provide the youngest examples known, indicating that Oncboprisiis had a much longer time range in the Cretaceous than was previously thought.

Records of Tertiary fossil cetacea from New Zealand are revised. Probable proto-squalodontid teeth from the McDonald Limestone Formation (Whaingaroan Stage, Lower Oligocene), Oamaru, are described, and represent the oldest cetacean remains found in New Zealand. This record demonstrates the probable extension of the Squalodontidae into the Lower Oligocene.