The present communication is the result of the examination of a considerable number of small Silurian Corals, from Wenlock and Colwall, made as long ago as 1883, and it was written with the intention of its being communicated to the Geological Society. I very much regret, however, that circumstances have arisen which render it extremely difficult, perhaps impossible, for me to place myself aga in incommunication with that body. The paper appears therefore in the pages of the Geological Magazine, a medium for publication which I hope from time to time to have recourse to.