"[illegible]" "Pholadiformis" and "[illegible]" concentrica which I understand also occur in the Lorraine of New York associated with Chamdrilaris' and Agosmychin radiata. It would seem that Pholadiformis may occur in the Lorraine or even Edm Only D, which seems certainly to occur in the Fels crits the early forms of C. leedi, The Richmond is a long series and terminates away everywhere in red beds that cover the tip have Richmond byzorga and Rhytonga. It seems as me proceeds east that the red beds become dominant and it is only important that the Lorraine goes over into early Richmond and then once into red beds for which reason one does not see Richmond forms in New York. They are known present at Ottawa and once or at Toronto and marine characters become once and once marked great mound into the Mani- trolins. Richmond forms Forest collected in the immediate vicinity of Three Rivers, Forest concludes that all of the St Lawrence county has Richmond of the