The London contact is again an abrupt one. The sandy argillaceous green lime shales are then four inches thick followed at once by the dolomite. The London sea lay in limps between the deposed Cambrian Shatu. These London outlins are to be seen at several places on the south shore of the sea while on the north shore appear the same limestone, red shales and gypsum. Only in the London is the Point Edward formation and then the "Drillstone pit" The Windsor limestones in their dolomitic phase are folitic with the volites very small. The Germans say that the rolitos are especially subject to diagnostic change. There are many hollow spaces that are then lined with small crystals of calcite and occasionally a small green crystal of chlorite. Sometimes the croting looks like stalacumite and when it maturos appears like algae or strom atypa,