Other examples of ritual survivals of such sacramental eating have already been noted, and it is not improbable that the eating of a sacred pastoral animal occurred at Samhain. (4) _Exogamy._--Exogamy and the counting of descent through the mother are closely connected with totemism, and some traces of both are found among the Celts. Among the Picts, who were, perhaps, a Celtic group of the Brythonic stock, these customs survived in the royal house. The kingship passed to a brother of the king by the same mother, or to a sister's son, while the king's father was never king and was frequently a "foreigner." Similar rules of succession prevailed in early Aryan royal houses--Greek and Roman,--and may, as Dr. Stokes thought, have existed at Tara in Ireland, while in a Fian tale of Oisin he marries the daughter of the king of Tír na n-Og, and succeeds him as king partly for that reason, and partly because he had beaten him in the annual race for the kingship.[755] Such an athletic contest for the kingship was known in early Greece, and this tale may support the theory of the Celtic priest-kingship, the holder of the office retaining it as long as he was not defeated or slain. Traces of succession through a sister's son are found in the _Mabinogion_, and Livy describes how the mythic Celtic king Ambicatus sent not his own but his sister's sons to found new kingdoms.[756] Irish and Welsh divine and heroic groups are named after the mother, not the father--the children of Danu and of Dôn, and the men of Domnu. Anu is mother of the gods, Buanann of heroes. The eponymous ancestor of the Scots is a woman, Scota, and the earliest colonisers of Ireland are women, not men. In the sagas gods and heroes have frequently a matronymic, and the father's name is omitted--Lug mac Ethnend, Conchobar mac Nessa, Indech, son of De Domnann, Corpre, son of Etain, and others. Perhaps parallel to this is the custom of calling men after their wives--e.g. the son of Fergus is Fer Tlachtga, Tlachtga's husband.[757] In the sagas, females (goddesses and heroines) have a high place accorded to them, and frequently choose their own lovers or husbands--customs suggestive of the matriarchate. Thus what was once a general practice was later confined to the royal house or told of divine or heroic personages. Possibly certain cases of incest may really be exaggerated accounts of misunderstood unions once permissible by totemic law. Cæsar speaks of British polyandry, brothers, sons, and fathers sharing a wife in common.[758] Strabo speaks of Irish unions with mothers and sisters, perhaps referring not to actual practice but to reports of saga tales of incest.[759] Dio Cassius speaks of community of wives among the Caledonians and Meatæ, and Jerome says much the same of the Scoti and Atecotti.[760] These notices, with the exception of Cæsar's, are vague, yet they refer to marriage customs different from those known to their reporters. In Irish sagas incest legends circle