232 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Eed Sandstone from Kiltorkan, Co. Kilkenny. The most perfect 

 specimens of this are in the collection of Trinity College, Dublin, 

 and are here figured. It may possibly be referable to the E. Scouleri, 

 from its great size ; and I do not feel justified, in the absence of 

 good specimens, in giving it a separate name. 



E. ScouLEEi ? Plate X. figs. 2, 3. 



Fig. 2 represents a portion of one of the body-rings, and fig. 3 

 probably the hinder edge of the carapace (as indicated by fig. 11, 

 in which a similar ornament occurs). 



The substance of the crust in these Irish specimens is thin, and 

 has cracked in longitudinal lines (fig. 3 a), i.e. perpendicular to the 

 margin of the segments. The under surface is curiously reticulato- 

 squamose, except at the hinder margia, where the crust is raised into 

 strong subcircular plicae and elongated tubercles (fig. 3 h). 



These remarkable elongated tubercles occur on the margin of the 

 carapace of E. Scouleri, and are visible in a photograph (kindly sent 

 to me by H. Mackeson, Esq., of Hythe) of the specimen in the 

 Andersonian Museum, Glasgow. They also occur on the hinder 

 margin of the body-segments. It is much to be desired that this 

 great fossil should be again figured, and with scientific detail. 



Locality. — Kiltorkan Hill, Co. Kilkenny, Ireland. In the upper 

 Old Red Sandstone. 



E. PYGMiEus, Salter. Plate X. figs. 4-8. 

 (Quart. Journ. Geol. Soc. vol. xii. p. 99, plate 2. fig. 4.) 



In the communication here referred to, the small half-oval cara- 

 pace, with somewhat remote eyes, was figured, as well as a few 

 front body-segments. I am now enabled to present the entire 

 body and the caudal joint (figs. 5 and 6), with the sculpture of 

 the head and body-rings (figs. 7 and 8), and to indicate the shape of 

 the small broad swimming-foot, from a specimen in Mr, R. Banks's 

 cabinet. 



The body tapers rapidly backwards ; it is not four times the length 

 of the head, and is broadest at about the fourth segment. The first 

 segment is very narrow, not above half the width of the second ; and 

 the rest are aU transversely broad until the eighth, when they begin 

 to lengthen out, the penultimate (eleventh) being square. The twelfth 

 (telson) is regularly long-triangular, the length being scarcely more 

 than twice the breadth. It is slightly keeled above ; the sides are 

 straight ; the apex is not produced. 



The elongation of the last body-joints before the tail helps to dis- 

 tinguish this small species from a closely-aUied form in the shales of 

 Lesmahago, Lanarkshire. This has the tail of the same shape, but a 

 shorter head ; and the penultimate body -joints are nearly one-and- 

 a-half times as wide as long. In other respects it is very similar. 

 It is described below as E. chartarius. 



Of the swimming-foot we have the two expanded terminal joints ; 



