Bicyclic oxygen-containing substrates have been hydroxylated by Calonectria decora and by Rhizopus nigricans. Poor yields of mono- and di-oxygenated compounds were obtained. Initial attack appears to occur at carbon atoms remote from the original oxygen function. ... IN the preceding paper we described the preparation of a set of bicyclic ketones and alcohols containing 15- 16 carbon atoms. The microbiological hydroxylations of some of these compounds have now ...