﻿EURYPTERUS HIBERNICUS. 149 



however, I have satisfied myself they are quite distinct, so far as the fragmentary nature of 

 the remains permit us to judge, although I have no doubt they belong to a species of the 

 genus Eurypterus. 



In a report to the British Association for the Advancement of Science, Section C, 

 Exeter, 1869, "On the Fossils of Kiltorcan, Co. Kilkenny," by W. Hellier Baily, Esq., 

 F.L.S., E.G.S., Acting Palaeontologist to the Geological Survey of Ireland, the author 

 recorded the discovery of some portions of a Crustacean which he considered to afford 

 clear evidence of their having belonged to Pterygotus. 



Mr. Baily then stated his belief as, to the probable identity of some of these specimens 

 with others collected at the same locality several years previous, and which have been 

 doubtfully referred by the late Mr. Salter to Euryjpterus Scouleri. Eor these Mr. Baily 

 proposed the name Pterygotus Hibernicus. 



I am informed by Mr. Baily that upon a subsequent visit to this rich locality he 

 obtained other Crustacea to which he applied the names of Belinurus Kiliorkensis and 

 Proracaris Machenrici. 



He has also kindly prepared and forwarded to me careful drawings of several of these 

 fragments, accompanied by notes, from which, by his permission, I have made the 

 subjoined extracts. 



The most distinctly marked fragments exhibit the same ornamentation as that seen on 

 figs. 16 and 17, PL XXVIII. 



Mr. Baily writes as follows : 



" In the collections of the Geological Survey of Ireland there are nearly a dozen 

 specimens from this place (Kiltorcan), which appear to me to be referable to Pterygotus 

 or Eurypterus. 



" There are two examples of the carapace or head, which although pressed out of 

 shape, sufficiently indicate the subquadrate form and marginal position of the eyes peculiar 

 to Pterygotus} One of these specimens is 3 inches in breadth by about 2 inches in 

 length, the posterior margin being imperfect (it is numbered B. 3400). 



" Of thoracic or abdominal segments there are two or three specimens, one being the 

 original fragment before mentioned as doubtfully referred by Salter to Eurypterus Scouleri, 

 and figured by him in the ' Quart. Journal Geol. Soc.,' vol xv, pi. x, figs. 2 and 3 a, b ; 

 the characteristic semilunar markings of the surface are well shown in this specimen 

 (F. 1317). See PL XXVIII, figs. 16 and 17. 



" In another fragment the margin of the lower edge is more irregular in outline am. 

 uniformly scalloped (B. 3382). See the subjoined Woodcut, Fig. 45. 



1 I should be unwilling to form an opinion upon this specimen ; judging from the drawing, I should 

 conclude the original is crushed completely out of all recognisable form. It may have been a head-shield, 

 but I cannot say with certainty to what it is referable ; if really subquadrate in form, it may be Slimonia, 

 assuming the eyes to be marginal. The head-shield in Pteryyotus is now known to be semicircular in 

 outline. 



