681, Cythereas vallandingham: Stephenson plant canyoxa. Hadrilla sea sinuata. Rafinesquina, with rhyncholite in Orthoclyna chula layers which here are well stratu- fied blue limestones. Covered by at least 25 ft of lime- stone, with abundant fossils among which plat. ponderosa is very common. This rock is quite similar to the underlying ortho but proba- dy in the lower part of what I have been calling the Cygnillite. It is more argil- lacous than the Orthorhy- chula rock, the hygrophy- are much less and plat. Ponderosa + Hadrillia make up most of the fossils. It ranges upward into more typical Cygnillite rock. At top the typical Rhyncholite layer Richardson comes in, with heavier layers seen the same. Also some clean ver layers near the top; in heavier layers near the top one finds fine blue, fine grained limestone. No fossils probably just below the Calmerock's limestone.