508 F. R. Coivper Reed — Geology of Waferford. 



A spicule of a Lyssakiiie Hexactinellid sponge, kindly identified by 

 Dr. Hinde, F.R.S., was also found by me in these beds. 



All these graptolites occur in the Glenkiln Shales of Scotland ; 

 and in addition to the above there are in the Dublin Museum the 

 following, labelled " Lady Elizabeth's Cove, Tramore," but con- 

 tained in exactly identical black slates and probably from the same 

 spot as my specimens. Mr. Clark, of the Geological Survey of 

 Ireland, has kindly furnished me with the list of the species, and 

 the specimens I have also examined myself: — 



Climacograptus bicornis, Hall Dicellograptus, sp. 



Ccenogra.ptus gracilis^ Hall Dendrograptus, sp. (?) 



Didymograptus, sp. 



In addition to the above, Professor Lapworth ^ quotes the following 

 list of graptolites given by Baily,* from " dark shales in Tramore 

 Bay " :- 



Climacograptus bicornis, Hall Dicranograptus ramosus, Hall 



Coenograptus gracilis, Hall Didymograptus, sp. 



Dicellograptus sextans. Hall Diplograptus foliaceus, Murch. 



The whole assemblage is characteristic of the Glenkiln Shales, and 

 we can therefore have no hesitation in ascribing the black slates 

 which I have mentioned to that horizon. The list of graptolites 

 given in the Survej^ Memoir of this district from the same locality 

 (designated "locality 21") is misleading, owing to the incorrect 

 determination of the species. No Ordovician beds older than these 

 graptolitic shales have so far been proved to exist in this district. 



Fig. 2. — Section in Cliffs, "West Side of Tramore Bay. 



A. Black calcareous slates on foreshore. 



B. Sandy impure and nodular limestones. 

 D. Intrusive diabase. 



b. Crushed beds at junction. 



The next beds to be described are the impure limestones which 

 immediately overlie the graptolitic beds. These arenaceous and 

 nodular limestones, which are so prominently developed along the 

 coast from Tramore to Newtown Cove, contain in bands here and 

 there a large number of fossils, which are, however, difficult to 

 extract in anything but a fragmentary condition. The beds dip at 

 angles from 45° to 70° to the WNW., but the average angle is 



1 Lapworth, Ann. Mag. Nat. Hist., ser. 5, vol. iv, 1879, p. 424. 



2 Baily, Q.J.G.S., vol. xxv, 1H69, p. 158. 



