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BRITISH FOSSIL CRUSTACEA. 



Genus 4. — Eurypterus, Dekay, 1825. 



The first notice of the discovery of Eurypterus was made in America in 1825 by Dr. J. 

 E. Dekay, who described and figured the only species then known, the Eurypterus remipes, 

 and referred it to the class Crustacea, and to the order Branchiopoda. 



FlG. 40. — Eurypterus remipes, Dekay (restored). 



Prom the Waterlime group (Uppermost Silurian), Waterville, Westmoreland, Oneida County, and at 

 Wheelock's Hill, Litchfield, Herkimer County, New York. 



Copied from Hall's ' Pateontology of New York/ 1859, vol. iii, part i, text p. 403*, figs. 6 and 7, and part ii, 

 plate 84a, figs. 1 and 2. " The parts represented are not in any respects imaginary, hut have all heen seen in 

 different individuals or parts of individuals, and are known to have the relations here expressed." (Explanation 

 of plate 84a by Prof. James Hall.) 



1. Dorsal view. 2. Ventral aspect. 



