and incorporating them into the river sands. The more time elapses in the upper Devonian, the more erasure the deposits become. The marine fronds are dug out and the first hull of the formation is continental. On the basis of plants the Upper Deer, is easily separable from the Pocono. The former always has the Archaeopteris flora while the Pocono is rich in Lepidodends. The two have been traced to within 200 feet of each other. The Pocono is probably also a continental deposit consisting largely of coarse sandstones with green shale domjon, none of which are red. Then too the Pocono has here at least one coal zone rather a high contribution, shale zone from 2 to 8 miles thick. The whole formation may attain to 1000 feet. Below it is not easily separated from the Devonian but above is distinguished from the Marcellus Chunk.