“…(Tonks and others 1931, p. 134; Wright 1934a, p. 21; Jones and others 1938, p. 79). It is proposed here to refer only to the thick strongly developed band of shells, well known to the Geological Survey, which has been found usually about 60 feet below the Arley Mine over a wide area and which constitutes the a recent-publication, has suggested that this nanic is more suitable for it (Eagar 1954 , p. 56). A fauna from 60 to 75 feet below thc Arley Mine (Fig.…”