The group of beds which I propose to identify and correlate with those known in France, Germany, and Belgium by the name of ‘Gedinnien,’ forming the lowest member of the Devonian system, extends in its full development from the Lizard peninsula in the west to Gorran and St. Austell on the east, and thence to near Newquay on the north. The upper beds, at least, may be traced through Fowey and Looe along the coast, and across the Start peninsula as far as Babbacombe, south of Dartmouth in Devonshire. They are referred to by Ussher as ‘Dartmouth Slates.’ They exist also on the north of the Devonian basin, and are mentioned by Etheridge as underlying the Lower Devonian.
