1904-1905.] 343 



beach, so well described and illustrated by Messrs. Wright 

 and Muff, of the Geological Survey, in their recent paper at 

 the Royal Dublin Society. This was also exhibited with their 

 map and photographs. Some recent geological work in other 

 parts of Ireland was also mentioned and partly illustrated. 

 The lecture was followed by a good discussion. 



The Forty-second Annual Meeting was held in the 

 Museum, College Square North, on 11th April — the President 

 (Mr. W. J. Fennell, M.R.I.A.) in the chair. There was a 

 large attendance of members, and previous to the reception 

 of reports and election of office-bearers for 1905-6 two short 

 papers were read, and the President announced that Mr. 

 R. Welch, M.R.I.A., had presented to the Club large photo- 

 graphs of Ralph Tate, F.G-.S., F.L.S., the Founder of the Club, 

 and of Gpeorge Crawford Hyndman, to be hung up in the Club- 

 room. 



"PERFORATIONS IN PRIMARY LIMESTONE." 



The first paper was on " Perforations in Primary Lime- 

 stone from North Donegal," by Mr. Joseph Wright, F.G.S., 

 who said : — While spending a few weeks last September near 

 the village of Dunfanaghy, North Donegal, his attention was 

 drawn by one of his party to a great number of peculiar 

 circular perforations in the primary limestone on the shore 

 of Lough Sessiagh. The limestone in which these occurred 

 was in situ, and sloped down at a very slight angle to the 

 margin of the lake. The perforations, which were hemi- 

 spherical in shape, varied somewhat in size, the largest and 

 best-preserved being one inch in width and half an inch in 

 depth. As he had never seen perforations like these before, 

 his curiosity was aroused as to the manner of their forma- 

 tion. The only signs of life on the rock were a few small 

 rounded clumps of moss, in size and shape the almost exact 

 counterpart of the surrounding holes. As the moss would 

 naturally accumulate moisture on the spot in which it grew, 

 this moisture would act on the underlying limestone and 



