two beds. At the Whirl-Pool Point these same beds may be only 2 1/2 ft. thick and never more than 5 1/2 feet while at the Smith and Morgan wells they have a greatly increased thickness of about 17 feet. In actual the stratigraphic position varies somewhat. Here the shells are prolific and especially the Stephendortus. Spirifer acuminatus is also more common than below the O.C & H.S. bridge. These faunal differences and thicknesses take place in less than 1/3 mile. At the next line of Jeffersonville the top of the S. acuminatus bed is well exposed. It is seen to be eroded and polished, sometimes exposed shells of S. acuminatus or a coal are cut through. Upon this surface the hydraulic beds rest with a very sharp and easily seen lithic change. The Devon fauna is completely extinguished at this line and the only fossil life seen in these basal Hydraulic beds is a Chonetes probably C. scitula.