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Alfvén's recent summary “Magnetospheric Research and the History of the Solar System” (Eos, October 23, 1984, pp. 769–770) contains a statement concerning the nature of Saturn's rings which might mislead readers who are unfamiliar with the current status of ring research. Saturn's rings do not consist of 10,000 or 100,000 separate ringlets. Recent reduction of centimeter wavelength occultation measurements by Voyager at 1-km radial resolution show the presence of 21 gaps in the classical ring system comprised of rings A, B, and C. Thus there are, in fact, 22 rings in the main system (G. L. Tyler, P. A. Rosen, and E. A. Marouf, “Classification of Saturn's Ring Features,” presented at the 16th Annual Division of Planetary Sciences of the American Astronomical Union meeting, October 8–12, 1984).