[No abstract given, the work begins as follows] I believe I am correct in stating that Columnaria has not so far been recognised as an Australian genus of Palaeozoic Corals. When I had the pleasure of examining the Museum at St. Stanislaus College, Bathurst, a few months ago, under the guidance of the Rev. Father Dowling, I observed a coral from Molong, that I took to be Columnaria from macroscopic characters only, subsequently confirmed, however, by microscopic. At any rate if the coral in question be not a species of this remarkable genus, then the candid confession of my ignorance as to its systematic position must be made. Father Dowling courteously allowed me to divide the specimen, a portion of which is now in the Australian Museum.