THE continent of Australia is not only by all odds the largest land-mass of the Oceanic area, but also presents in its physical characters the sharpest contrast to the remainder of the region. Continental in size, only a small section of its great extent possesses a tropical environment, the whole of its interior and most of its western portion being a vast and almost waterless desert. Instead of the conditions of life being easy and the food-supply abundant, as in the tropical islands, over great parts of its area the food-quest absorbed a large proportion of the energies of the inhabitants. In the desert the summer heat is terrible, while on the elevated plateaux and in the mountains of the south-east the winters are snowy, and the cold is often intense. The sad and almost shadeless forests of eucalyptus, acacia, and she-oak are in sharp contrast to the dense growths of the tropics, and the peculiar animal life, characterized by the abundance of marsupials and great struthious birds, sets it apart from most of the rest of the Pacific world. Moreover, Australia is to a large degree isolated from the remainder of the whole area in that only at the northern extremity of Queensland does it closely approach any of the surrounding lands, although its north-western coasts are not very remote, as Oceanic distances go, from eastern Indonesia. The native peoples of Australia were in great measure as distinctive as its physical features, climate, flora, and fauna. Ranked in their culture among the lowest peoples of the world--wholly ignorant of agriculture, pottery, and domestic animals (except the dog), and over large portions of the area These three groups have been taken as evidence of three successive strata of people. Of these the Tasmanians represent the oldest and most primitive, and that which presumably once spread over the whole Australian continent. The second group is explained as due to a great wave of immigration from the north which swept over and absorbed, or in places exterminated, the Tasmanoid type. Latest in point of time is theAUSTRALIA