end 3062 In the cliffs these P. dentata seem to be indicated by a sharp line separated from the lower lens (pencil) Streptelasma austicum. Tob. These gradate to creek level and it is in the basal beds that R. copax is found, similar specimens around. In some layers these come one-half the layers and the same is true of Streptelasma. The latter are never erect always prostrate as usually occurs by byssus. According to Cummins the P. dentata have a thickness of about 30 feet. Above are 62 feet zone of Richmond. Then the Clinton shale 4 feet and then the Clinton limestone on 10 feet thick. I see that R dentata is found 38 feet from but it here now. Returned to Cincinnati on the 3,10 P.M. Sep. 19-1909 Sunday At home at Rosies. In the afternoon to see the Mullers.