Trans. R. Dub. Soc., N.S., Vol. III. Plate VII 
Figs. 1. Sketch Map of visible and concealed Areas of ArchaanRocks. 
Fig. 2. Sketch Map of visible and concealed Areas of Silurian Rocks. 
Visible Silurian Tracts. 
Chain line indicates margin of Land -areu. 
Forster & Co., Lith., DUBLIN 
Be 
