about 125 Veniella humilis, some Cardium speciosum, Mactra sp., Pholodomya sp. and other fossils in limestone concretions near base of the exposure and Placenticeras sp., Cardium speciosum, shark teeth, fish vertebrae and scales, Mactra sp., Tellina sp., Ostrea sp., Fucoides, etc. in the upper part of the exposure. The lower part of the exposure may be Pierre but the upper part is the typical greenish-yellow Fox Hills sandstone as is exposed below White Rock, with large concretions of sandstone with iron cement, flaking off horizontally in large scales practically the size of the concretions. The sandstone is quite soft, easily excavated with a knife. The Ostrea were well preserved, though thin, and valves were easily freed from sand on both sides with the knife. The other fossils were friable, the shell crumbling, leaving only casts. Some of the Mactra are very fine. The lower part of the exposure consists of alternating strata of thin bedded clay shales and sandstones, with lime-
