The Australian aborigines live mostly in small hordes, often consisting of from thirty to fifty men, women, and children. Such a horde, according to Mr. Brough Smyth, “is in fact but an enlargement of a family circle, and none within it can intermarry.”[1933] Among the Efatese, in whose clan-system the prohibition of incest is a fundamental law, each clan is regarded as one family. “A child of _a_,” says Mr. Macdonald, “calls her own mother mother, and all her mother’s tribe (clan) sisters mother; and calls by the name of father not only her own father but all his tribe (clan) brothers; and they all call the child their child.”[1934] The Malays, according to Professor Wilken, live, as a rule, in large houses containing a great number of differently related persons.[1935] “In Nanusa,” Dr. Hickson remarks, “I understood that marriage was not permitted between members of the same household. The enormous households of the Nanusa archipelago are probably the remnants of a much more complete system of intra-tribal clanships, which has become almost obliterated in the more highly developed races of Sangir and Siauw.”[1936] Among the Nairs, a household, the members of which are strictly prohibited from sexual relation with each other, includes, as a rule, many allied men, women, and children, who not only live together in large common houses, but possess everything in common.[1937] Among the Kafirs, the dimensions of a kraal are determined by the number of a man’s family and dependants, the family consisting of the father together with his children, including married sons.[1938] The South Slavonians live in house-communities, each consisting of a body of from fifteen to sixty members or even more, who are blood-relations to the second or third degree, of course only on the male side.[1939] These related families associate in a common dwelling or group of dwellings, governed by a common chief. “At the present moment,” Sir Henry Maine remarks, “the common residence of so many persons of both sexes in the same household may be said to be only possible through their belief that any union of kinsmen and kinswomen would be incestuous. The South Slavonian table of prohibited degrees is extremely wide.”[1940] Again, Professor Kohler points out the connection between the extensive prohibitions of the Hindus and their large households.[1941] In Wales there existed, as a national institution, a joint-family called “trev,” consisting of four generations. Marriage, says Mr. Lewis, was to be “outside the trev, or kindred who lived together within one enclosure.”[1942]