GEOLOGICAL SOCIETY OF DUBLIN. 89 



Pagurus Cuanensis, P. Hyndmanni, P. Thompsonii, Crangon vulgaris, 

 C. sculptus, C. Allmanni (new species), Hippolyte varians, H. Cranchii, 

 H. Thompsoni, My sis chamceleon, from the Dublin coasts. 



Mrs. I. Townsend, Rossbegh, per Dr. Kinahan. — Psammobia vesper- 

 Una, from Lough Ine, Co. Cork. 



H. Meredith, Esq., per G. A. Pollock, Esq. — Falco peregrinus, Co. 

 Meath. 



TO THE LIBRARY. 



" Natural History Review," for July and October, 1856. Erom the 

 Editors. 



"Transactions of the Natural History and Philosophical Society of 

 Liverpool." Vol. X. Erom the Society. 



" On the Prevention of the Smoke Nuisance." A Prize Essay. By 

 C. W. Williams, Esq. Erom the Author. 



" Geological Map of Ireland, geologically coloured, according to the 

 latest observations." From Eichard Griffith, Esq., LL. D. 



GEOLOGICAL SOCIETY OE DUBLIN. 



WEDNESDAY EVENING, JANUARY 14, 1857. 



The President, Lord Talbot de Malahide, in the Chair. 



The following noblemen and gentlemen were admitted as Members : — 

 1. Lord Bandon, Castle Bernard, county of Cork; 2. Charles Earran, 

 Esq., M. D., Lower Mount-street; 3. Rev. James M'lvor, Ardstraw 

 Glebe, county of Tyrone ; 4. Marcus Keane, Esq., Beech Park, Ennis. 

 A resolution was passed unanimously, allowing the President to be 

 elected for five years in succession, instead of only two years, as at 

 present. 



Rev. Professor Haughton then read the following paper : — 



on the pitchstone and pitchstone porphyry of barnesmore and 

 lough eske, county of donegal. 



During a visit to the county of Donegal in the summer of 1856, I ob- 

 served a remarkable series of dykes of felspathic trap and porphyry in- 

 tersecting the granite of Barnesmore Gap, exhibiting occasionally a 

 tendency to pass into a description of glossy pitchstone. Subsequently 

 I was favoured by James "Wood, Esq., of Castlegrove, with some spe- 

 cimens from the mountains beyond Lough Eske, in the same locality, 

 which are genuine pitchstone, passing into amygdaloidal, or rather oolitic 

 porphyry, the cavities being filled with a white mineral, which I consider 

 to be stilbite. As the locality is a new one for pitchstone, and the mine - 

 ralogical composition of the rock unusual, I thought it might not be 

 uninteresting to place on record its analysis, and the result of my discus- 

 sion of that analysis. 



VOL. IV. x 



