Since Mr. Hazzledine Warren's paper was published in 1912 much work has been done in the pits at Ponder's End and Angel Road. Two other pits in the same district have also been investigated, these being situated at Hedge Lane and Temple Mills. Thanks to the efforts of Mr. Warren, Mr. A. Wrigley, and Mr. E.T. Newton, a large amount of botanical material has been collected, and the flowering plants have been sent to me for examination. The additions thus made to the list are so numerous, that we have now obtained one of the most interesting Arctic floras yet discovered in these low latitudes. Several of the species until the present time have been unrecognized in the fossil state, and two seem to be new to science. In these circumstances it seems advisable to place on record the new finds, especially as some of them may be of zonal value. The geology of the plant-bearing deposits has already been dealt with by Mr. Warren, and it is therefore unnecessary to go into detail. The stratum which yields the plants conforms approximately to the contour of the existing Lea Valley; but it dips southward at a steeper angle than that of the present river, and therefore in that direction it gradually sinks below the water-level, though on the north it lies well above the river. At the point where the old valley of the Lea opens out into the valley of the Thames there is a sudden change, and these