Abstract A discussion of Silurian stratigraphical classification is followed by detailed comments upon the correlation of Llandovery, Wenlock, Ludlow and Přidolí rocks throughout the British Isles. Correlation charts show selected successions in Wales, the Welsh Borderland, Northwest England, Scotland and Ireland. The concealed Silurian rocks of Eastern and Southern England are considered relatively briefly, as are the enigmatic records from Cornwall. Finally, a chart and short commentary serve to correlate the Silurian successions of New York, Anticosti Island, Oslo, Gotland, Estonia, Thuringia, Bohemia, Podolia and Kazakhstan with the international standard employed here for the British Isles. There is an extensive bibliography.