U. Silurian and OM Med in S. Staffonhhire. 



443 



Itcontains Chonetes striatella^ O.eleganhda, R. nucula, Linfftdasj).(?), 

 fragments of fish scales and bones, Onchus, Thelodus, Holopella 

 olsoleta, Pachytheca. 



Rusty-red marly sandstones, 



passing into 



Olive shales with L. minima. 



Eb 



One band of massive yellow ' 

 sandstones, with L. minima 

 and Orbiculoidea rucjata (36 

 feet thick). 



Dark-green shale. 

 Platyschisma. 

 Bubbly shale. ^ 

 Yellow sandstone. 



[Lingula band.) 



Green and some yellow gritty 

 sandstones with L. Lewisii. 



Flaggy green sandstones. 



Green sandstones with L. 

 Lewisii throughout. 



Dolerite. 



Fig. 3. Section of Downton Sandstones in the lower part of Brewins Tunnel 

 and at the " Basin Section ". Scale 8 feet = 1 inch. 



^ This is the lowest bed seen on south side of Brewins Tunnel. 



{To be concluded in our next Number.) 



