state that one in Black River, there is probably about 32 feet of it here. It's apparently one from Black River. The exact contact between the Trenton and Black River was not observed. It seems the former is dark blue to green while the latter is more cloudy. Then too which fails to see certain courses higher our joint Black River beds here at Montreal or that we see probably there is a time break here between the B.R. and Trenton. The Trenton begins with low Trenton and the fauna reminds decidedly of Breault's forms at Trenton Falls. This is older Trenton than any of Trenton Falls itself is of the upper Chazy. The Beetonstown one did not see but from Raymond's guide book it would appear to be equivalent of Lake Champlain division D. The lower D - Cassin and all of E is not present at Montreal. The Potsdam is present about Montreal.