Referee's report by Robert Etheridge, on a paper 'On the organization of the fossil plants of the coal-measures. Part IV - Dictyoxlon, lyginodendron, and heterangium' by William Crawford Williamson The referee 'hesitates not to recommend' that the paper be published in Philosophical Transactions. It appears 'too lengthy', although the author should not shorten 'what appears to be at first sight laboured descriptions of the parts'. Also, the drawings require references. Subject: Botany [Published in Philosophical Transactions, 1873]. 8 April 1873