Clare Island Survey — Land and Fresh-water Molluscu. 23 43 



The High Grounds of Curraun, Croaghpatrick, and Mweelrea, 

 and the doolough valley. 



• 



Judging by the fauna of the cliffs of Croaghmore on Clare Island, where 

 at an elevation of 1000 feet we find twenty-seven species of mollusca, it 

 cannot be due to altitude that the districts now under consideration yield 

 such poor lists. This poverty is, I fancy, due rather to the enormous 

 accumulation of peat upon these mountainous areas. Perpendicular cliffs 

 are few owing to the smoothing action of the former ice-covering, and where 

 these exist, as on the northern face of Croaghpatrick, the crumbling nature of 

 the rocks renders them unsuited to molluscan life. The fact that all these 

 mountains are composed of non-calcareous rocks also militates against the 

 compilation of a long list of species. In order to survey satisfactorily such a 

 district as the present one, a great deal of time and labour would have to be 

 given up to the work. This I was not able to do, but I consider that it is best 

 to publish the somewhat meagre list which I have compiled. This consists 

 of twelve species only, and is the result of four laborious days' work, none 

 of which, however, were at the most suitable seasons. Twenty-two species 

 known to occur in the Uoolough valley are included also, as this locality is 

 completely isolated from the adjoining districts by high ground or peaty 

 areas. 



In the following list, C signifies that the species was found on Curraun Mt., 

 P on Croaghpatrick, M on Mweelrea and its neighbours, and D in the Doolough 

 Valley. With the exception of those from the last area, all specimens were 

 collected above 500 feet altitude. 



List of species found in the mountainous areas. 



Limax arborum, P. A. intermedius, P. 



Agriolimax agrestis, D. Punctum pygmaeum, D. 



A. laevis, P. Sphyradium edentulum, D. 



Vitrina pellucida, D. Coehlicopa lubrica, D. 



Hyalinia alliaria, D. Pupa anglica, M, D. 



H. nitidula, I). P. cyliudracea, D. 



H. pura, D. Vertigo pygmaea, D. 



H. radiatula, D. V. substriata, D. 



H. crystallina, P, D. Limnaea pereger, M, D. 



Euconulus f ulvus, D. L. truncatula, M. 



Zonitoides nitidus, D. Ancylus fiuviatilis, C, D. 



Z. excavatus, D. Pisidium personatum, D, M. 



Arion ater, C, D, P. P. casertanum, C. 



A. subfuscus, C. Margaritana margaritifera, D. 



F2 



