Hystolites. All of the trilobites and the brachiopods are clearly of Upper Cambrian fauna more like those of the Llano's country of Texas than of the Oriskany of the Ohio valleys. If you get well turn over that both Upper Cambrian and Ordovician are present. Here in the Hystolites beds could be gotten a fine shell collection, and in the end at least 50 species. Near the base of the Shales glauconite is common in the sandstone group. See for Sharply underlying the pinkish Upper Cambrian limestones, occur dark blue Ordovician li. in thick beds. These are marked by an abundance of discretely articulated Phymatodes (small heads) Cla- dosporas (stems 1/2 inch thick), Atrypa reticularis, and other things that may be hygrograms or small Cladosporas. Clearly these are Ordovician in age. Orthus appear commonly beds of Atrypa minorusi-