PLATE VI. 
DEVONIAN CRUSTACEA. 
Order—MEROSTOMATA. 
Sub- Order—EURYPTERIDA. 
The largest telson or terminal jomt which has yet been discovered of Pteryyotus anglicus, 
Agassiz. From the Old Red Sandstone near Forfar. Figured of the natural 
size. See page 42. 
The distal border of the penultimate joint, to which it was attached, is 
indicated in outline. 
From the Collection of James Pownie, Esq., F.G.S., Reswallie, Forfar. 
