In the thirty-eighth volume of the Quarterly Journal of the Geological Society is a paper by me on the Corals of the Inferior Oolite, and in the following volume is one on the Corals of the Great Oolite. The forty-first volume of the same periodical contains a supplement to the latter, but to the former no such addition has yet been made. The present communication makes good that deficiency, and is a supplement to it. It contains, besides the description of some new species, additional remarks on others already known, mention of genera about which doubt has been expressed, and the description of one which I consider new. Another genus, Stephanocænia, though well known elsewhere, has up to the present time remained unrecognized as British, and is now introduced on the evidence of two well-marked species from the Inferior Oolite of Gloucestershire. The addition to our Coral fauna of such genera as the above, and of others equally well known which I have also had the opportunity of making known, is of even greater interest than the discovery of new genera and species. Epismilia, Donacosmilia, Cyathophyllia, Adelastræa, Stylosmilia, Rhizangia, Thecoseris, Zeptophyllia, and Enallohelia, form a valuable contribution towards the Coral fauna of this country.