but less abundant. A physical change, but of little moment, occurs here for now the deposits are seemingly more than 3/4 blue shale with thinner laminations than usual. In the first 4 feet of the Arnheim one sees little in the way of fossils other than R. alternata and Platystrophia lypota. Then fossils become more abundant and at about 8 feet above the base occur Oithon retusus. Here also L. olivoidales; [no smaller specimen] and Dalmanella multi. The same type of beds occurs upwards for 10 feet with a tendency for more bi, bi's as one proceeds into younger deigns. Lestum The Arnheim lycopra are at once far rarer and less diverse than at West Chester. On the other hand in the Drp. Autumn R. ponderosa and P. lyncy are surprisingly abundant, which is not the case or at West Chester.