ERRATUM

THE BIOLOGICAL BULLETIN, Volume 166, Number 3, Page 529 The following correction should be made in the paper by Chizuko Obata and Shin-Ichi Nemoto entitled, Artificial parthenogenesis is in starfish eggs: production of parthenogenetic development through suppression of polar body formation by methlxanthines (1984, Biol. Bull. 166: 525-536): the scale bar in A of Figure 4 should read 150 µm. Thus the last sentence of the legend should read: Bar in A representing 150 µm is common to A through F.