Scaphopods are of rare occurrence in the Paleozoic of North America. Dentalium and Plagioglypta have been recorded from formations as old as Middle Devonian; however, their occurrence is always sporadic and it is only in the Upper Carboniferous rocks that they are met with in any number. The form here described is the first Devonian occurrence of the Class that has come to the writer’s notice throughout a period of thirty-five years’ active collecting in the Devonian of the Mississippi Valley.