166 Dr. E. Asselberghs— 
shales and limestones with Calceola sandalina Lamarck. It follows, 
therefore, that the Meadfoot Beds and the Staddon Grits are the 
equivalent of the Siegenian, Hmsian, and the beds with Spurifer 
cultruyugatus Roemer. The correlation therefore stands thus :— 
ARDENNES AND RHINE. SoutH DEVONSHIRE. 
Couvinian: Shales and limestones with Calceola sandalina. 
Beds with Spirifer cultrijugatus 
Emsian or Coblenzschichten Staddon Grits and Meadfoot Beds. 
Siegenian or Siegenerstufe. 
Gedinnian (Upper). Dartmouth Slates. 
The comparative study of the Devonian Beds of the two countries 
has been left in this summary state. I will try to go a little 
further by recalling what is known concerning the Meadfoot Group. 
SEcT. 3. 
Ussher ! has shown that the Meadfoot Group of Cornwall can be 
divided into three horizons, of which the two oldest have been 
traced throughout the county and also in Torbay. The following 
is the succession of strata in descending order :— 
c. Grey slates with occasional beds and seams of grit (thick beds of grit 
are seen near Plymouth). 
b. Very fossiliferous shales, slates, and grits; calcareous bands with 
corals and crinoids (lenticular limestones). 
a. Dark grey slates with hard grit and quartzite beds. 
The middle horizon is easily recognizable by its calcareous bands 
and fossiliferous beds—the latter have yielded a very rich fauna— 
and can be traced through the numerous folds. 
The first fossils were found at Looe and were described by 
Davidson. H. Kayser has drawn attention to the affinities of 
this fauna with that of the Taunusquartzit of the Rhine.2 More 
recently Drevermann showed that the fossils of Looe exist in the 
Siegenerstufe of Seifen.* In 1915 I had the opportunity of seeing 
the fossils from Looe in the British Museum (Natural History), and 
I was impressed by the great affinities of the fauna of Looe with 
that of the Lower Hunsriickian of the Bassin de lKifel. All the 
brachiopods from Looe occur in the Ardennes. The following 
table gives Davidson’s list, beside my identifications :— 
Athyris sp. ? pl. iv, fig. 4. Athyris avirostris Krantz. 
Spirifera primaeva Steininger? ?  Spirifer primaevus Steininger. 
pl. viii, figs. 1-3. 
Spirifera sp. ? pl. iv, fig. 33. Athyris avirostris Krantz. 
Spiriferina cristata var. octopli-  Spirifer excavatus Kayser. 
cata ? pl. vi, figs. 11-13. 
1 Mem. Geol. Surv. England and Wales: Explanation of Sheet 350 (1903), 
348 (1907), 347 (1909), 349 (1912). Proc. Geol. Assoc., vol. xx, 1907, pp. 78-93. 
“ Geology in the Field’’: Jubilee Vol. Geol. Assoc., 1910, pp. 859, et seq. 
* Davidson, ‘‘ A Monograph of the British Fossil Brachiopoda’’: vol. iii, 
pp. 126-7. Mem. Pal. Soc., 1864-71. 
3 Jahrb. der. k. Preuss. Geol. Land., 1882, pp. 128-31. 
* Palaeontographica, vol. iv, 1904, pp. 229-88. 
