MAIN ARGYLL AND ITS INLAND MOLLUSCAN FAUNA 237 



northern localities for which the species has been authenticated 

 for the western slope of Scotland. 



Paludestrina stagnalis. 



Loch Gilp, in a pond near the shore, one, David Robertson 

 (Kelvingrove Museum, Glasgow, 12th May 1913). 



Unio margaritifer. 



River Orchy, near where it flows into Loch Awe, two (Alex. 

 Somerville, January 1886) ; Loch Awe, one (G. A. Frank 

 Knight). 



Pisidium pusillum. 



Loch Gilp, a few in a pond near the shore, probably collected 

 by David Robertson (Kelvingrove Museum, Glasgow, May 

 19^3)- 



Pisidium obtusale. 



Loch Gilp, a few in pond near the shore (Kelvingrove Museum, 

 Glasgow, May 1913, probably collected by David Robertson). 



Not much has been published in respect of the area now 

 dealt with or any part of it, but there is one paper of capital 

 importance, by R. Standen and J. Ray Hardy, on " The 

 Land and Freshwater Mollusca of Oban and the Island of 

 Lismore" {Journal of Conchology, Oct. 1893, vol. 7, pp. 266- 

 274), which includes a couple of pages of most informing 

 introductory matter concerning the district and its physical 

 characteristics. This list includes records of 7 slugs, 36 land 

 and 10 freshwater shells — altogether 53 — curiously enough 

 the same total number as is contained in the present paper. 

 The species recorded by Messrs Standen and Hardy which 

 have not so far been authenticated for the Conchological 

 Society's record-scheme, and not therefore inclusible in this 

 paper, are ten in number, as follows : — 



Hyalinia draparnaldi. 

 Zonitoides nitidus. 

 Punctum pygnicBum. 

 Vallonia pulchella. 

 Vallonia costata 



Pupa anglica. 

 Planorbis crista. 

 Planorbis spirorbis. 

 Livimea truncatula. 

 Pisidium fontinale. 



Besides these, I have seen mention of Hygromia fusca and 

 Planorbis glaber having occurred in the vice-county, which 



