COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 420 Konkoly Observatory Budapest 1970 February 20 THE 3323 VARIABLE STARS IN OR PROJECTED ON THE MAGELLANIC CLOUDS DOWN TO -0.8 ABSOLUTE MAGNITUDE From 1895 till 1950 the Harvard College Observatory searched variable stars in the Magellanic Clouds, rounding up more than 3000 variables to which 150 were added during the investigation from 1962 performed by Cecilia Payne- Gaposhkin and myself. We thoroughly "sieved" all announced variables by making more than two million photographic and more than 10,000 photovisual observations on some 2000 plates. The final results are in the table, expressing the distribution of eleven classes of variability in the two nearest galaxies. Class of Variables Large Magellanic Small Magellanic Cloud Cloud Classical Cepheids 1128 1116 Irregular Normal 314 162 Irregular Important 88 ? Eclipsing Variables 76 32 Questionables 72 25 Long Periodic 50 24 Possibly Cepheid 33 60 RR Lyrae Variables 30 31 Link-Cepheids 2?* 39 Undecodes 23 ? W Virginis 16 2 ________________________________________________ Total 1832 1491 *These are AR Lyrae in one of the mini star clusters and included as the Link-Cepheids only because this cluster is situated almost exactly between the Cloud and the Milky Way. SIRGAY GAPOSHKIN Harvard College Observatory