32 



THE SCOTTISH NATURALIST 



Anodonta cygnea. 



Carlingwark Loch (R. Rimmer; Roy. Scot. Mus., Edinburgh). 



Sphcerium corneum. 



Argrennan, ditch, 22nd April 1884 (Fred. R. Coles); Loch 

 Finn, 26th April 1884 (id.)-, Castle Douglas, September 1890 

 (Win, Evans) ; Maxwelltown, same date (id.) ; Castle Douglas 

 Loch, October 1890, one, small ; also a couple of var. nucleus 

 (R. Rimmer; Roy. Scot. Mus., Edinburgh, May 1913). 



Pisidium fontinale. 



Black Stockton mill-dam, 28th April 1S84 (Fred. R. Coles); 

 Maxwelltown, 13th September 1890 (Wm. Evans). 



Pisidium pulchellum. 



Maxwelltown, September 1890 (Wm. Evans). 



Pisidium cinereum (casertanuni). 



Curling-pond above Creetown, 25th May 1912 (Edward Collier). 



Pisidium pusillum. 



Black Stockton mill-dam, 28th April 1884 (Fred. R. Coles); 

 Argrennan mill-dam, 3rd September 1884 (id.); Mabie, in 

 small stream crossing the road to Marthroun above the house, 

 Sth May 1S89, numerous (R. Rimmer; Roy. Scot. Mus., 

 Edinburgh); Maxwelltown, September 1890 (Wm. Evans); 

 Castle Douglas, same date (id.). 



Pisidium mi Hum. 



Clouden, near Irongray, a few (R. Rimmer ; Roy. Scot. Mus., 

 Edinburgh, May 19 13) ; Ingleston Loch, Twynholm, 30th 

 April 1884 (Fred. R. Coles); Maxwelltown, September 1890 

 (Wm. Evans). 



The list thus includes n slugs, 35 land and 23 fresh-water 

 shells a total of 69 ; 3, however, seem to need confirmation. 



The deficiencies which offer themselves for further research, 

 confining our attention to those which have been authenticated for 

 one or more of the three adjoining counties, Wigtown, Ayr, and 

 Dumfries, are as follows, the letters W, A, D designating these 

 areas : 



