Polyandry is a survival of the group-marriage of the mother-age.
This is true also of forms of group-marriage other than those mentioned above.
The subject of group-marriage is one about which I do not find it possible to speak so dogmatically.
Because this form of group-marriage is the simpler, it is also usually regarded as the earlier.
There is also, of course, a form of group-marriage that differs from 'Pirrauru marriage,' and is apparently simpler.
Even in Australia the phenomena of Pirrauru and of group-marriage are confined particularly to the southern regions.
But there is also a second form, which, though less frequent, is of greatest importance for an interpretation of group-marriage.