Like the Yue-Chi they have probably contributed to form some of the physical types of the Indian population, and it is noticeable that polyandry is a recognized institution among many Himalayan tribes, and is also said to be practised secretly by the Jats and other races of the plains.
Papers on "The Levirate and Polyandry," following up the line of his previous investigations (Fortnightly Review, 1877), were the last work he was able to publish.
In some islands polyandry was practised; in others the natives were monogamous.
When the islands first became known to Europeans, the Hawaiian family was in a stage including both polyandry and polygyny, and, according to Morgan, older than either: two or more brothers, with their wives, or two or more sisters with their husbands, cohabited with seeming promiscuity.
Polygamy was known, but limited, both in early and late times, to persons of exceptionally high position, while of polyandry there is hardly any trace.
Among the customs of the Tibetans, perhaps the most peculiar is polyandry, the brothers in a family having one wife in common.
Derivatively it includes the practice of polyandry, but it has become definitely restricted to expressing what has been, and still is, far the commonest type of relations between the sexes (see Family and Marriage).