tany, as indicated in the table, also in Normandy and
Maine; in the Boulonnais district only the middle and upper divisions
are known. In south France in the neighbourhood of Cabrieres, about
Montpellier and in the Montagne Noire, all three divisions are found
in a highly calcareous condition. Devonian rocks are recognized,
though frequently much metamorphosed, on both the northern and
southern flanks of the Pyrenees; while on the Spanish peninsula they
are extensively developed. In Asturias they are no less than 3280 ft.
thick, all three divisions and most of the central European
subdivisions are present. In general, the Lower Devonian fossils of
Spain bear a marked resemblance to those of Brittany.

_Asia._--From the Ural Mountains eastward, Devonian rocks have been
traced from point to point right across Asia. In the Altai Mountains
they are represented by limestones of Coblentzien age with a fauna
possessing Hercynian features. The same features are observed in the
Devonian of the Kougnetsk basin, and in Turkestan. Well-developed
quartzites with slates and diabases are found south of Yarkand and
Khotan. Middle and Upper Devonian strata are widespread in China.
Upper Devonian rocks are recorded from Persia, and from the Hindu Kush
on the right bank of the Chitral river.

_England._--In England the original Devonian rocks are developed in
Devon and Cornwall and west Somerset. In north Devonshire these rocks
consist of sandstones, grits and slates, while in south Devon there
are, in addition, thick beds of massive limestone, and intercalations
of lavas and tuffs. The interpretation of the stratigraphy in this
region is a difficult matter, partly on account of the absence of good
exposures with fossils, and partly through the disturbed condition of
the rocks. The system has been subdivided as shown in Table III.

TABLE III.

+-----------------------------+-------------------------------+
| North Devon and West | |
| Somerset. | South Devon. |
+-----------------------------+-------------------------------+
/ | Pilton group. Grits, slates | Ashburton slates. |
U | | and thin limestones. | Livaton slates. |
P | | Baggy group. Sandstones | Red and green Entomis slates