"None of the Clarks Mills zones appears to be so young as typical Ceymans. The question arises if it is not best to include the Clarks Mills formation in the Silurian, calling it the Leipsicommian. This term may then include the Clarks Mills in the upper half part — or Lepiditias and Marlius for the lower half with these ostracods. If this is done it will remove most of the Silurian aspect from the Ordovician — the present known conditions — including the Homocerin zone of New York. May 8-1901 Spent the entire day at Clarks Mills collecting and packing the fossils by zones. Shipped two boxes by express. Tentaculites after its appearance in the Clarks Mills formation continues to occur to the end even through the split gull chief. There is nothing in these upper beds which leads me to believe they are as high as the Ceymans. Possibly no