DEC £3 



August, 191 5. The Ifish Nahiralist. 137 



THE NON-MARINE MOLLUSCA OF SOUTH 

 GALWAY. 



BY R. Ar PHILLIPS, M.R.I. A. 



The Land and Freshwater Mollusks of the western and 

 eastern divisions of Co. Galway have been dealt with in 

 valuable papers in the " Irish Naturalist " and " Journal 

 of Conchology," but, so far as I can discover, practically 

 nothing has been pubHshed concerning the mollusks of 

 the southern division (Vice-county No. 15 of Praeger's 

 " Irish Topographical Botany ") which comprises that por- 

 tion of the county lying south of the railway from Oranmore 

 to Ballinasloe. 



For some years past, as opportunities occurred, I have 

 at various times collected specimens, and investigated the 

 distribution of these animals, and am now in a position to 

 record the existence of one hundred and three species in 

 the vice-county, a number larger than is known to occur 

 in any other Irish county -division except Clare, which has 

 one hundred and six species. 



Seventy-nine of these were found before the end of 

 the year 1910, and a list of them furnished to Mr. A. W. 

 Stelfox, who included them in the tables of distribution in 

 his " List of the Land and Freshwater Mollusks of Ireland " ^ 

 but as details of local distribution are not given in that work 

 these particulars are here published for the first time. 



The area under consideration is about 738 square miles 

 in extent, its surface is diversified and, for the most part, 

 well adapted to sustain molluscan life. The greater 

 portion, about four-fifths, lies on the Carboniferous Imie- 

 stone, and the remainder on the Old Red Sandstone and 

 Silurian of the Slieve Aughty mountain range between 

 Woodford and Loughrea. It is w^ell watered, in the east 

 by the Shannon with its tributaries and Lough Derg, in 

 the north by the River Suck and the Ballinasloe branch 

 of the Grand Canal, and in the south and centre by numerous 

 lakes, streams, and large drains. 



« 1 Proceedings Roy. Irish Academy, vol. xxix., Section B,, page 65-164, 

 1911. 



A 



