“…Until the present no antei8o acid with a molecular weight lower than that of 10-methyldodecanoic acid (Hansen, Shorland & Cooke, 1954a) had been shown to occur in animal depot fats. In cow milk, however, all the even-numbered normal volatile acids (C4-C12) are present (Hilditch, 1947), as are a number of oddnumbered normal, is8o, and anteiwo acids of higher molecular weight (Shorland, Gerson & Hansen, 1955a, b;Hansen, Shorland & Cooke, 1954b;Hansen & Shorland, 1951. )…”