The Pennsylvania Final Report p.675 gives the total Medina as 1365 feet divided into Oneida and Medina, and the whole into 4 groups of conglomerate and sandstone and three of shales. In the first place there is absolutely no ground to separate the series into Oneida and Medina. Further I saw no ground for assuming that the shale group separate the series into four separate sandstones. Further if one adjust the correct groups as shales then their thickness do not agree with mine. All in all it is one series of alike ma- terial as far as the exposures show. The series begins with white coarse quartzites for about 40 feet. Then the regular Shawangunk rein quartz grits appear and continue to the waytop. Then too the new feature due is that all of the conglomerate beds also have black shale inclusions, some are rounded but as a rule they are flat and in sizes of to 4 or 5 inches. They are very common and shellings and are seen from