The early Pliocene Hamilton local fauna from southwestern Victoria, Australia, has at least fifteen kinds of macropodoids including propleopines, potoroines, hypsiprymnodontines, sthenurines, and macropodines. New taxa described here include a potoroine, Milliyowi bunganditj n. gen. and sp. and the macropodines Dorcopsis wintercookorum n. sp., Thylogale ignis n. sp., and Kurrabi pelchenorum n. sp. The other ten genera present are represented by specimens for which no species assignment has been made. These are Propleopus, Hypsiprymnodon, Troposodon, Simosthenurus, Dendrolagus, Protemnodon, Macropus (Notomacropus), Wallabia, and two Macropodidae gen. indet. (1 and 2). -- Several extant genera whose living species are almost exclusively rain forest or rain forest fringe dwellers occur in the fauna, suggesting that the fossil assemblage predominantly represents a rain forest environment Includes bibliographical references (p. 34-36) The early Pliocene Hamilton local fauna from southwestern Victoria, Australia, has at least fifteen kinds of macropodoids including propleopines, potoroines, hypsiprymnodontines, sthenurines, and macropodines. New taxa described here include a potoroine, Milliyowi bunganditj n. gen. and sp. and the macropodines Dorcopsis wintercookorum n. sp., Thylogale ignis n. sp., and Kurrabi pelchenorum n. sp. The other ten genera present are represented by specimens for which no species assignment has been made. These are Propleopus, Hypsiprymnodon, Troposodon, Simosthenurus, Dendrolagus, Protemnodon, Macropus (Notomacropus), Wallabia, and two Macropodidae gen. indet. (1 and 2). -- Several extant genera whose living species are almost exclusively rain forest or rain forest fringe dwellers occur in the fauna, suggesting that the fossil assemblage predominantly represents a rain forest environment Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-1978). Fieldiana Geology New Series No. 1 began June 29, 1979