JOURNAL OF CONCHOLOGY. II3 



CARNARVONSHIRE NOTES, JULY, 1883. 

 By W. DENISON ROEBUCK. 



During the month of July I visited various parts of Car- 

 narvonshire, noting such mollusca as I came across. Conway 

 Castle and the banks of a small stream which runs through the 

 town were visited upon one occasion, and on another the church 

 of Llangelynen, a few miles S.W. of Conway. A walk from 

 the landing place at Trefriw along the old road to Llanrwst 

 yielded me the interesting new variety of Arion ater cited in 

 the list, but not very much else, the Silurian slates appearing 

 to be very unprolific in mollusca. This walk showed some- 

 what forcibly the influence of man's handiwork upon the pre- 

 sence of mollusca, for after a long dreary and unproductive 

 walk along a road where no human habitations existed, I found 

 various species thickly congregated together amongst the rank 

 vegetation and under stones immediately surrounding the old 

 disused turnpike gate called ' Gwydir Gate,' all within the space 

 of a very few yards. The same was the case in and about the 

 buildings of the Dinas railway station near Carnarvon, where I 

 twice had half-an-hour to wait for trains. The walk from Rhyd- 

 ddu station to Beddgelert and Pont Aberglaslyn — Silurian slates 

 again — was also unproductive of mollusca, Arion ater being the 

 chief representative. I had not the opportunity of ascending 

 Snowdon or I should have endeavoured to ascertain what mol- 

 lusca occur at or near the summit. I have put my notes into 

 list form as being more convenient for reference. 



Arion ater. — At Beddgelert, and all along the road from there 

 to Rhyd-ddu station, Trefriw, at Gwydir gate, and at Llan- 

 gelynen ; abundant wherever I collected. 



Arion ater var. albolateralis. — I was pleased to meet with 

 this beautiful form in plenty at Trefriw, and I also found 

 one, a full-grown and seemingly very old specimen, with 

 dulled colours, under a log of wood at Dinas railway 

 station. 



