title: Erratum.
abstract: In the report by Simpson et al., "Saturnian trapped radiation and its absorption by satellites and rings: The first results from Pioneer 11" (25 Jan., p. 411), in Fig. 1B the right hand scale of flux (for the electrons with energies > 3.4 million electron volts) should be multiplied by a factor of 10 so that the maximum flux measured by the electron current detector is 3 x 10(6) cm(-2) sec(-1). Furthermore, in reference 9, the following citation was inadvertently omitted: M. H. Acuña and N. F. Ness, ibid., p. 444.