RUDDY : SHELLS OF MERIONETH. 1 85 



Helix aspersa. — Very rare inland, but is very abundant on 



the sea coast near Barmouth and Towyn. 

 H. nemoralis. — General and plentiful. 

 H. nemoralis var. hortensis. — About Llanderfel. 

 H. arbustorum. — Hedge roots near Llanderfel, but does 



not seem to be either general or plentiful. This species is 



a very recent find, but I traced it along two hedges for about 



half-a-mile. 

 H. caperata. — General and plentiful. 

 H. ericetorum. — On the Carboniferous limestone rocks at 



Trevor, near Llangollen, which is a little beyond the 



boundary of Merioneth, but I have not seen any in this 



county. 

 H. hispida. — General and plentiful. 

 H. rotundata. — Very general and plentiful. 

 Bulimus obscurus. — On the Carboniferous limestone rocks 



at Trevor, near Llangollen, a little beyond the boundary 



of Merioneth ; I have not seen any in this county. 

 Pupa marginata. — About Llanderfel. 

 P. umblicata. — With P. marginata. About Llanderfel. 

 Balea perversa. — In old walls about the village of Llanderfel, 



near Bala. 

 Clausilia rugosa. — Found about Llanderfel, but is very 



plentiful along the out-crops of the Bala limestone (Lower 



Silurian) in several places in the county. 

 Cochiicopa lubrica. — Plentiful between Bala and Corwen. 

 Cyclostoma elegans. — On the Carboniferous limestone 



rocks at Trevor, near Llangollen, beyond the Merioneth 



boundary ; not yet found in this county. 



Physa fontinalis var. albina at Farington, South 

 Lancashire. — On March 4th, I found two specimens oi Physa 

 fontinalis v. albina at Farington, — W, H. Heathcote, March 

 28th, 1887. 



