Thirteen species of gatsropods are described from the Lower Devonian Lilydale Limestone near Melbourne. Two of these are type species of the genera Scafaetrochus (S. lindstrotni Etheridge) and Gyrodoma (G. etheridgei (Creswell)

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One new genus and five new species of gastropods are described from the late Early Devonian Bell Point Limestone, on Cape Liptrap Peninsula, 150 km southeast of Melbourne. Six other gastropod taxa are recorded. The new genus Bassotrochus is assigned to the family Omphalotrochidae. Together with Orecopia murrayi sp. nov., also from the Bell Point Limestone, Bassotrochus angulatus sp. nov. represents the earliest known occurrence of this family to date. The other species are Tropidodiscus waratahensis sp. nov., Straparollus (Euomphalus) sp., ? Mourlonia sp., Gyronema bellense sp. nov., Murchisonia (Murchisonia) bassensis sp. nov., M. (Murchisonia) sp. A, M. (Murchisonia) sp. B and M. (Hormotomina) sp. Also described are Micromphalus clarkei (de Koninck) from near Yass, N.S.W. and an indeterminate form from the Waratah Limestone, Cape Liptrap Peninsula. This shallow water gastropod fauna occurs as both coquinite and non-coquinite assemblages associated with a diverse invertebrate community which includes corals, stromatoporoids, bivalves and brachiopods.