224 



R. ETHER1DGE, JT7N., ON A 



selves, appear to indicate a species of far greater proportions than 

 those of E. Scouleri, Hibb. In 1867 Professor Page exhibited at 

 a meeting of the Edinburgh Geological Society* portions of E. 

 Scouleri from the Lower Carboniferous beds of Berwickshire. Un- 

 fortunately no description of these has appeared ; they were, I 

 believe, also found by Mr. Stevenson. 



2. Description of the Specimens. — In his remarks on E. Scouleri, 

 Mr. H.Woodward states that the " two anterior body-rings are orna- 

 mented with a single row of narrow, acute, well-defined, spine-like 

 squamae." The posterior free margin of the abdominal somites " is 

 ornamented on its dorsal border, with a series of blunt, rounded, 

 equidistant spines, and the surface itself encased with squamae, 

 whilst the ventral border is roundly dentated, and that of the pen- 

 ultimate segment more acutely so. The ventral surface is not 

 covered with squamae, but is finely punctate " f. In the fine 

 fragment represented by fig. 1, may be observed five elongated 



Fig. 1. — Eurypterus (?) Sievensoni. 



Spines probably from the dorsal posterior margin of an abdominal somite. 

 From Kimmerghame Quarry, near Dunse, Berwickshire. 



and bluntly pointed spines. The two outer on each side are about 

 equal in size, and united one with the other until near their free ex- 

 tremities ; they appear to have been separated from the middle and 

 largest spine by a smaller one on each side, now only partially pre- 

 served, making in all seven spines. I take these to represent those 

 bluntly rounded spines described by Mr. Woodward in E. Scouleri 

 as ornamenting the free dorsal posterior margin of the abdominal 

 somites. The anterior portion of both the spines, in the specimen 

 (fig. 1), and the concavities between them are covered with nar- 

 row, acutely inclined, spine-like squamae, much resembling those 

 figured by Mr. Woodward on the carapace and two anterior body- 



* "Notes on some New Fossils {Eurypterus Scouleri?) from the Tuedian or 

 Passage Beds of Berwickshire." Trans. Greol. Soc. Edinb. i. p. 57. 

 t Op. cit. p. 137. 



