Family, with the power of the patriarch, is evolved, all the members of the family in all its branches will (if Totemism persists) have the same totem; derived from the father. Thus there will now be a local totem group, a group mainly of the same totem name, as is practically the case in parts of Central Australia.[26]

It is necessary to understand this clearly. Take a very early group, in a given district; suppose it, at first, to be anonymous, and let it later be called the Emu group. So far, all members of the group will be Emus, they will form an Emu local group. But, next, suppose that there are many neighbouring groups, also at first anonymous; let them later be styled Rat, Cat, Bat, Sprat. Suppose that each such group now (for reasons to be indicated later) takes its wives not from within itself, but from all the other groups; that these women bring into the Emu group their group names; and that their children inherit their names from their mothers. Then the name, 'Emu group,' will cling to that local aggregate, as such; but, in time, the members of the Emu group will all be, say, Rats, Cats, Bats, and Sprats, so called from the group-names of their alien mothers. Suppose that, for one reason or another, children at last come to inherit their names and totems from their fathers. Then a Cat father will have Cat children, though his wives may still be of different totems, and his sons' children will also be Cats, and so the local group will become mainly, if not wholly, a group of one totem, the Cat. The Arunta of Central Australia do trace kinship in the male line, and thus there is 'one area which belongs to the Kangaroo men, another to Emu men, another to Hakea flower men,' and so on. This has reached such a pitch that 'in speaking of themselves the natives will refer to these local groups,' not by the prevalent totem names in each, but 'by the name of the locality which each of them inhabits,' namely, as men of the Iturkawura camp, and so on.[27] Thus we might say 'the Glen Nevis men,' 'the Corradale men,' and so on.