Thursday May 23-1901 Left New Bloomfield before 7 for the Clarks Mills beds where we spent the morning. Around my not hindering our collecting, seemed far less this time than on my first visit. Examined the yellow flint chokes in the fields opposite the mills for miles but saw almost none. Showed my first visit demonstrated them to be the macro glencoe zone. At the end of the field in the woods the Quisthany occurs as a fine conglomerate. Dare no trace of the Pentamerus salatus gone and I believe there is now none. Therefore there is a look of deposi- tion here between the “Clarks Mills beds” and the “yellow flint chokes” and again between the latter and the Quisthany. Here at Clarks Mills there is a sharp difference between the Clarks Mills beds and the Devonian blue marl bed limestone. The line is marked by Lepidodicta while the upper begins with the exotic but