168 Dr. EH. Asselberghs— 
I therefore propose the following correlation :— 
Meaproot Group. SIEGENIAN. 
c. Grey slates with bands, and c. Hunsriickien supérieur: phyllades 
locally thick beds, of grit. bleu foncé de Neufchateau 
(intercalations gréseuses dans 
le Grand Duché de Luxem- 
bourg). 
6. Fossiliferous beds of Looe: 06. Hunsrtickien inférieur: quartz- 
slates and grits, calcareous ophyllades fossiliferes, sou- 
shales, and lenticular masses vent calcareux ; lentilles cal- 
of dark-grey limestone. carieuses de Bouillon. 
a. Dark grey slates with hard a. Taunusien: phyllades bleu 
grit and quartzite beds, foncé avec intercalations de 
eres quartzite gris bleuatre. 
SEot. 4. 
It follows logically from the above correlation that the Staddon 
Grits, which lie between the beds with Calceola sandalina and the 
Meadfoot Beds, correspond to the Emsian Group and theCultryugatus 
Beds of the Ardennes. 
The stratigraphical succession in the Staddon Grits is not known 
in detail as yet, but I do not doubt that the principal fossiliferous 
horizons which characterize these beds in the Ardennes will be 
found in Devonshire by detailed research. These horizons are, in 
ascending order, the beds with Spirifer hercyniae and Tropidoleptus 
rhenanus, the beds with Sp. arduennensis and the beds with Sp. 
cultryjugatus. In fact, some localities im the neighbourhood of 
Torquay have already yielded Tropidoleptus rhenanus; others 
Sp. cultrijugatus.+ 
From the foregoing remarks the correlation of the Lower Devonian 
and the Lower Middle Devonian of South Devonshire and the South 
of the Ardennes stands thus :— 
SoutH or DEVONSHIRE. ARDENNES AND RHINE. 
Limestones and slates with Calceola Assise & Calceola sandalina 
sandalina. Couvinien. 
ae a Sp. cultrijugatus 
3 Assise & Sp. arduennensis Emsien 
Staddon Grits. P 
Assise a Sp. hercyniae et ou 
Tropidoleptus rhenanus | Coblenz- 
stufe. 
Meadf Grey slates. Hunsriickien supérieur Siegenien 
eo sein Fossiliferous Looe Beds. Hunsriickien inférieur | «. enw 
ces. | Slates with quartzite. Taunusien | eet | 
stufe. 
Dartmouth Slates. Schistes bigarrés du Gedinnien. 
In the correlation table given by Dr. J. W. Evans in 1917,” it will 
be noticed that the Staddon Grits are made to correspond with the 
1 Ussher, ‘“‘ The Geology of the Country around Torquay ” (Explanation of 
Sheet 350): Mem. Geol. Surv., 1903. 
2 Evans, ‘‘ Devonian (Sedimentary Rocks) of Great Britain’: Handb. d. 
Regionale Geol., vol. 11, pt.i; The British Isles, 1917, pp. 134-5. 
