PLATE XXII. 



DEVONIAN CRUSTACEA. 



Order— Merostomata. 

 Sub- Order — Eurypterida . 



Stylonurm Scoticus, H. Woodw. (P. 12G.) 



Cast, in Grey Sandstone, of the inner surface of the head-shield ; natural size. 

 From the Old Red Sandstone Quarry, Montroman Muir, near the Forfar and 

 Montrose Pike. 



The intaglio half (showing the inside of the carapace itself) is preserved in the 

 British Museum. 



The relievo is in Lady Kinnaird's Cabinet, Rossie Priory. 



