IN your last issue Prof. A. H. Green, reviewing Dr. A. Geikie's “The Scenery of Scotland viewed in Connexion with its Physical Geology,” described the alleged resemblance between the Durness fossils and certain North American types as “an announcement of the greatest interest.” The fact is certainly of the “greatest interest,” but the “announcement” was made nearly thirty years ago by the late J. W. Salter in the Quarterly Journal of the Geological Society, 1858, p. 381. Mr. Salter refers to the fauna as “this truly North American assemblage,” and compares the species one by one with Prof. Hall's types.