596 Meeting of the British Association. [Oct., 



&c., &c., &c. He pointed out tlieir relation to certain beds in the 

 south-west of Ireland, wliich were believed to occm' in tlie same 

 horizon as the Piltou shales. In referring to the labours of the 

 Irish Geological Survey, the President paid a graceful tribute to the 

 memory of Professor J. Beete Jukes, F.li.S., its late Director, whose 

 active life has terminated since the publication of our last number. 

 Among the latest labours of Mr. Jukes was the publication of a 

 series of papers " On the Carboniferous Slate (or Devonian Kocks) 

 and the Old Eed Sandstone of South Ireland and North Devon ;" 

 " On North Devon and West Somerset," and " South Devon and 

 Cornwall." There is reason to apprehend that the additional 

 effort needed to carry out these and other extra-official scientific 

 labours did much to curtail the life of one who was beloved by all 

 who knew him, and whose loss we must all deeply regret. 



Taking the Irish locahties first, the President contrasted the 

 "Wexford district, with its 200 feet of Old Red Sandstones resting 

 conformably on Cambrian strata, with Hook Point, Comeragh, 

 Dungarvon, West County Cork, as far south-west as GlengarifT and 

 Killarney, where the unfo'^siliferous " GlengarifF Grits " attain a 

 thickness of 10,000 feet. Of all this vast thickness of sedimentary 

 deposits, included in the Old Bed Sandstone series in Ireland, only a 

 thin band of Yellow Sandstones is fossiliferous, having yielded plants, 

 mollusca, crustacea, and fishes. 



This band (which is elsewhere reported upon by Mr. W. H. 

 Baily) occurs at Kiltorcau, co. Kilkenny. 



Professor Harkness also showed the change which the Lower 

 Limestone shales or Carboniferous slates undergo in passing south- 

 westward from Hook Point, where their thickness is inconsiderable, 

 to Cork Harbour and Kinsale, where they are 6500 feet in thick- 

 ness, and where gritty beds make their appearance, which in Coom- 

 hola Glen attain a thickness of 3000 feet. These " Coomhola 

 Grits " contain some peculiar fossils, and have others also common 

 to the Carboniferous slates. 



Returning to Devonshire, the President pointed out that to the 

 north-east of Baggy Point hard purple sandstones occur (= to the 

 Old Red Sandstones), overlain in North Devon by light-coloured beds, 

 the equivalents of the " Yellow Sandstones " of Ireland ; that above 

 these again, at Marwood, were greenish-grey grits, with plant- 

 remains (Filicites linearis and Sayenaria Velthnmiana), such as 

 the base of the Carboniferous slates afibrd, these being identified with 

 the " Coomhola Grits ;" higher still, the Pilton beds had yielded 

 fossils common also to the Carboniferous slates. He called attention 

 to a common misapprehension existing among English geologists 

 that the " Coomhola Grits " are hdow the base of the Carboniferous 

 series, whereas they are truly a part of the Carboniferous slates. 



He believed tiae difficulty of correlatuig the two areas arose 



