[Footnote 6: "Memoirs of the Geological Survey of the United Kingdom.--Decade x. Preliminary Essay upon the Systematic Arrangement of the Fishes of the Devonian Epoch."] [Footnote 7: As the Address is passing through the press (March 7, 1862), evidence lies before me of the existence of a new Labyrinthodont ('Pholidogaster'), from the Edinburgh coal-field, with well-ossified vertebral centra.]