The publishers of this monograph state that this is the first complete work on phosphatides in over 20 years. During this period much information has been made available on their chemical structure, purification, analysis, occurrence in nature, biochemical and physiological roles, and industrial applications. The author deals with each of these aspects in turn. He covers the literature through 1949 thoroughly and incorporates the most important 1950 developments. A valuable feature of the work is his discussion of lipid nomenclature in various parts of the world and his careful usage of one system, that adopted by the American Chemical Society. The bibliographies and indexes are good. The printing and binding are up to the high standard of American Chemical Society monographs.