R. Clark — Silurian Fossils of North-East Ireland. 499 



The absence of Rastrites maximus, Dicellograptus anceps, and 

 Pleiirograptus linearis having been commented on by Messrs. 

 Swanston and Lapworth, it is satisfactory to record that I have since 

 found these forms, the first-named at Tieveshilly, the second in a 

 pocket of black slate in greenish mudstone at Coalpit Bay, whilst 

 Pleiirograptus linearis was collected from the locality at Lissan 

 previously referred to. 



A unique specimen from the Lower Birkhill (Llandovery) 

 beds of Coalpit Bay claims attention. It has been identified by 

 Mr. E. T. Newton, F.K.S., as Berwynia Carruthersi, a Lycopodiaceous 

 plant, originally described by Dr. Hicks from Pen-j'-glog (Q.J.G.S., 

 vol. xxxviii) ; it had not hitherto been recognized in Ireland. 



Passing from what may be styled the Belfast immediate area 

 towards the south and south-west, some ten additional fossiliferous 

 localities were added to those already recorded. From the district 

 comprised within Sheet 48, they were, with one exception, all 

 indicative of the Middle or Lower Birkhill (Llandovery) horizon, 

 and, save from one locality, Lough Erne, on the north-east margin, 

 which yielded eight species of Graptolitidee, the specimens obtained 

 were not well preserved. 



The Armagh district (Sheet 47) afforded good and interesting 

 collecting ground, though no fossils from the Silurian beds appear to 

 have been previously recorded. A close examination disclosed 

 numerous localities in both upper and lower strata, ranging from 

 Lower Llandovery to Upper Llandeilo, this latter zone being well 

 represented a little north of Poyntzpass by the occurrence of — 



Dicellograptus Moffatensis. Dicranograptus ziczac. 



,, sextans. Diplograptus bimucronatus. 



„ Forchammeri. Ccenograptiis gracilis. 



„ truncatus. Climacograptus ScJiarenhergi. 



Didymograptiis siiperstes. Siphonotreta micula. 



These forms were found in the black carbonaceous, cherty band 

 generally associated with this particular horizon. 



Within the radius of Sheets 58 and 59, more especially in the 

 north-east corner of the latter, finely preserved specimens of Upper 

 Llandovery Graptolites were found in the railway cuttings close to 

 the tunnel on the Newry and Armagh Eailway, whilst in the vicinity 

 of Castleblayney both Llandovery and Caradoc specimens occur in 

 numerous places. In Sheet 58 Ccenograptus gracilis was noted in 

 the railway cutting east of Newbliss, indicating Upper Llandeilo. 



Sheet 69 afi'orded substantial additions to the list already published 

 therefrom. Graptolites were procured from some twelve additional 

 localities, and from many of these the specimens were obtained in 

 excellent preservation ; in this respect those from Killyrue, four 

 miles south-east of Cootehill, are specially worthy of mention. 



The known localities for Silurian fossils on Sheet 80 have been 

 much increased, and good specimens obtained of Lower Caradoc 

 and Llandovery species ; of the former Diplograptus foliaceus, 



