Notices of Memoirs — Fossil Fish f torn Keuper. 507 



Y. — Notes on the Crystalline Schists oe some parts of Ireland. 

 By C. Callaway, D.Sc, M.A., F.G.S. 



THE author gives a summary of results obtained by a preliminary 

 survey of the principal areas of Irish metamorphic rocks, viz. — 



1. Donegal, including parts of the adjacent counties of Londonderry 

 and Tyrone. 



2. Connemara, extending the term to cover the region lying between 

 "Westport, co. Mayo, and the granitic mass west of the town of Galway. 



3. The south-eastern corner of the county of "Wexford. 



In each of these areas the following facts were observed : — 



(a) A series of hypometamorphic rocks, consisting typically of 

 fine-grained schists, altered grits, and quartzites. A clastic structure 

 is more or less distinct in the three areas, but is least evident in 

 Connemara. 



(b) A group of highly crystalline schists, displaying no trace of an 

 original sedimentary origin, dipping as if it passed below the hypo- 

 metamorphic rocks. At Wexford there are true gneisses. In Conne- 

 mara the rocks are les3 felspathic, the chief types being quartzose 

 gneiss, quartz-schist, mica-schist, hornblende-schist, quartzite, and 

 crystalline limestone. This description will also apply to Donegal. 



(c) Granite, underlying (b), and in Connemara and Donegal clearly 

 intrusive. 



The author urges that this analogy is not due to the metamorphic 

 action of the granite ; for — 



1. The mineral characters apparent in the schists adjacent to the 

 granite are uniformly distributed through the lower series from bottom 

 to top. 



2. The evidence collected is hostile to the view that this lower series 

 ever graduates into the upper. 



It is concluded that the balance of proof is in favour of the Archaean 

 age of the bulk of the Irish schists. 



1. In the Wexford district the schists are thrown against Cambrian 

 and Ordovician rocks by faults, and do not pass into them in the 

 localities alleged by the Irish Survey. 



2. In Connemara conglomerates of Llandovery age contain large 

 rounded fragments, not only of the older schistose series, but also of 

 its intrusive igneous rocks. 



3. In the Lister region the metamorphic area is separated from the 

 Ordovician rocks of Pomeroy by a ridge of granite and diorite three 

 miles in breadth. 



The lithological analogies between the Irish schists and the Archaean 

 rocks of Anglesey and other British metamorphic districts are also of 

 weight in the argument. 



VI.— On the Discovery op Fossil Fish in the New Bed Sandstone 

 (Upper Keuper) in Warwickshire. By the Bev. P. B. Brodie, 

 M.A., F.G.S. 



THE author observed that, considering the thickness and extent of 

 the New Bed Sandstone in Great Britain, the paucity and rarity 

 of fossils was remarkable, especially when compared with the abundant 

 fauna and flora of the Trias in Europe. In a field so comparatively 



