Survivals in custom testify to a long period of transition from group to tribe--Stealthy meetings of husband and wife--Examples--Evidence to a past of jealousy of incestuous group sire--Evidence from teknonymy--Husband named as father of his child--Formal capture as a symbol of legal marriage--Avoidance between father-in-law and son-in-law--Arose in stage of transition--Causes of mother-in-law and son-in-law avoidance--Influence of jealousy--Examples--Mr. Tylor’s statistics--Resentment of capture not primal cause of this avoidance--Note on avoidance. CHAPTER VIII THE CLASSIFICATORY SYSTEM The classificatory system--The author’s theory is the opposite of Mr. Morgan’s, of original brother and sister marriage--That theory is based on Malayan terms of relationship--Nephew, niece, and cousin, all named ‘sons and daughters’--This fact of nomenclature used as an argument for promiscuity--The author’s theory--The names for relationship given as regards the group, not the individual--The names and rules evolved in the respective interests of three generations--They apply to food as well as to marriage--Each generation is a strictly defined class--Terms for relationship indicate, _not kinship_, but relative seniority and rights in relation to the group--The distinction of age in generations breaks down in practice--Methods of bilking the letter of the law--Communal marriage--Outside suitors and cousinage--The fact of cousinage unperceived and unnamed--Cousins are still called brothers and sisters; thus, when a man styles his sister’s son his son, the fact does not prove, as in Mr. Morgan’s theory, that his sister is his wife--Terms of address between brothers and sisters--And between members of the same and of different phratries--These corroborate the author’s theory--distinction as to sexual rights yields the classificatory system--Progress outran recognition and verbal expression--Errors of Mr. Morgan and Mr. McLennan--Conclusion--Note--‘Group marriage’ APPENDICES A.--ENGLISH, ORCADIAN, AND HEBREW VILLAGE SOBRIQUETS B.--THE BA RONGA TERMS OF RELATIONSHIP INDEX SOCIAL ORIGINS AND PRIMAL LAW CHAPTER I THE EARLY HISTORY OF THE FAMILY THE FAMILY. THEORY OF MR. ATKINSON