PLATE XXVII. 



CARBONIFEROUS CRUSTACEA. 



Order — Merostomata. 

 Sub- Order — Eurypterida. 



Head-shield of Eurypterus Scouleri, Hibbert, with the two most anterior body-segments 

 still united thereto (natural size). (P. 134.) 



From the Freshwater Carboniferous Limestone, Burdie House, near Edinburgh. 

 Coll. Andersonian University Museum, Glasgow. 



