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III
SOCIAL ORGANISATION
155

magical food-producing ceremonies, and also as to the climatic conditions under which they live. We shall find that the Lake Eyre tribes are under a minimum rainfall, a very high temperature, and a prevailing aridity, with fertile intervals, when there is abundance of animal and vegetable food supplies. At the further end of the series, whether in Queensland, New South Wales, Victoria, or South Australia, the tribes living, say, on the coast lands, are under climatic conditions very different from those of Central Australia, with a good rainfall, a more temperate climate, and a plentiful and constant food supply, both animal and vegetable. This comparison comes out clearly when the tables of rainfall, given in the introductory chapter, are inspected.

This comparison will fall in line with former conclusions, namely, that the tribes of the Lake Eyre basin have remained in a far more primitive condition socially than those of the south-east of Australia.

If so, it would point to conditions of better climate, and more abundant and regular food supply, as potent causes in the advancement of the social condition of the south-east tribes. At present it is not known what is the condition of the tribes which exist in the great western deserts between South Australia and Western Australia. Their social organisation would be of the greatest interest for comparison with that of tribes living in the more fertile parts of this continent.

Taking all into consideration, I feel that the most probable conclusion to arrive at is, that the Intichiuma ceremonies represent a very early form of totemistic beliefs; but beyond that, there are not sufficient data to allow of a safe hypothesis as to the origin of the totemic names.

Yet it may be well to keep in view that no two tribes are practically at the same point of development, as indicated for instance by an advance from group marriage to some form of individual marriage. Thus I see no difficulty in believing that while the Arunta have reached male descent with segmentation into eight sub-classes, they may have retained early beliefs as to their totem ancestors.