STANDEN : MOLLUSCA OF PORTSALON. 1 99 



*H. arbustorum L. — One specimen only amongst golf-links 

 rejectamenta, Portsalon. Probably brought down by the 

 stream running through the sand-hills from woods higher 

 up the valley. The shell found is adult-type, and keen 

 search was made for additional specimens, without success; 

 but I have no doubt careful search in the neighbouring 

 woods would reveal its habitat. 

 H. ericetorum Mliller. — Very abundant everywhere on the 

 sand-hills, also on many of the road-side fence-backings, 

 and showing much variation ; but the prevalent form is a 

 remarkably dark one, which Dr. Westerlund has referred 

 to a new species, H. lavipra. Though British conchologists 

 still prefer to consider this form as merely a variety of the 

 typical H. ericetortim, it certainly is quite as worthy of 

 specific recognition as many of the continental ' species. , 

 H. acuta Miiller. — Very common everywhere on the dunes, 

 but does not exhibit the variation met with in many other 

 places, the variety strigata Menke being the only one 

 noticed, and the shells are mostly young at this season. 

 H. nemoralis Miiller. — Occurs at Portsalon, Kinny Lough, 

 and 'Bottom Shore' Bay, but not at all commonly, alive. 

 The wind-blown shells on the dunes are not so numerous as 

 one might expect. Most of the living shells are remark- 

 ably beautiful in colour, and strikingly marked, principally 

 with interrupted bands. Specimens were observed high up 

 on the trunks of beeches on the roadside near Rathmullen. 

 H. hortensis Miiller. — Much more plentiful at Portsalon 

 than H. nemoralis^ but only found in two places — one, a 

 stunted hedgerow, and the other at the base of a steep cliff 

 just above high-water mark amongst some bramble bushes. 

 The bandless yellow form predominates, but richly-colored 

 banded shells occur, together with very pretty variety 

 arenicola Macgill. This species is down for Donegal with 

 a query in Dr. Scharff's list, but at Portsalon it must be 

 said to occur frequently. 



