Observance of days of abstinence and quiescence not unknown in the lower culture, p. 1.—Probable origin of the sabbatarian regulations in primitive taboos, pp. 1, 2.—_Tabu_ in Polynesia and equivalent customs in other parts of the world, pp. 2, 3.—Classification of taboos, p. 4.—Characteristics of taboos, pp. 4, 5.—Their animistic sanctions, pp. 5, 6.—Reasons for imposing taboos which necessitate abstinence and quiescence, pp. 6, 7.—Connection of communal taboos with those observed by individuals, p. 7.