A new clay pit at Kirton in Lindsey, Lincolnshire, gives continuous exposures of 21 feet of clays and limestone nodules of the davoei zone at the top of the lower Lias, 18 feet of similar beds and 8 feet of Maristone Rock Bed belonging to the middle Lias, and 38 feet of shales and limestones of the tenuicostatum and falciferum zones of the upper Lias. Liparoceratid, amaltheid, dactylioceratid and hildoceratid ammonites occur and allow the zones to be delimited with some accuracy.