Cilia, Ciliated Epithelium and Ciliary Activity . Volume 15 of International Series of Monographs on Pure and Applied Biology–Modern Trends in Physiological Sciences. BY JOSÉ A. RIVERA, Naval Biological Laboratory of the School of Public Health, University of California, Berkeley. Cloth.$9.50. Pp. 167, with 19 illustrations. Pergamon Press, New York, Oxford, London, Paris, 1962