158 R. STANDEN : LAND AND FRESHWATER MOLLUSCA. 



' In a pit at Hale Moss ' (Hardy's List, 1865). 



' Found in an old pitstead on the new road from Ardwick to 

 Gorton ; in another in Hough-end-Clough, on the left-hand side 

 of the middle bridge, amongst the weeds and in the mud ' 

 (Dj'son's List, 1850). 



Moss Lane pits, amongst grass roots (R.D.D.). 



This variety is given as a distinct species in the lists of Hardy, 

 Dyson, and Darbishire, viz., Pisidium henslowianum Jenyns. 

 var. pulchella Jenyns. A few in a pond in Eccles Fields. 



' Pits in Hough-end-Clough, amongst grass and dead leaves 

 at the margin. Near Withington Workhouse, and in many other 

 places' (Hardy's List, 1865). 

 var. cinerea Alder. 



' Found at Reddish, and in the drain crossed by the road 

 from Chorlton Chapel to Jackson's Boat' (Hardy's List, 1865). 

 Pisidium pusillum Gmel. Generally distributed. Especially plentiful 

 at Farrington, Grimsargh, Prestwich, and Crossens. Few ponds 

 or other sheets of water are v/ithout this species. Burnley 

 (F.C.L.). 



Remarkably large and abundant in a ditch at Swinton (T.R.). 

 ' Pits and wet places near Jackson's Boat, Hough-end- 

 Clough, Seedley, etc' (Hardy's List, 1865). 



Dyson does not give a Lancasliire locality for this species. He, 

 however, gwts Pisidium ol^^usa/ePfeifftr (which equals P. pusillum 

 var. obtusalis Lam.) as ' in some pits adjoining Ordsall Clough. 

 The only locahty I know for this species' (1850). 

 Pisidium. nitidum Jen. Plentiful in a small pond near Lytham. Park 

 Lane, near Burnley (F.C.L.). 

 Pits at Clayton (T.R.). 

 var. globosa Jeff. Several occurred in the Lytham pond. 

 Common in a ditch at Swinton (T.R.). 

 XTnio tumidus Phil. 



' Found in Dallam Brook, near Warrington, and in Little 

 Sankey Mill-pool' (Dyson's List, 1850). 



Dyson gives the above localities as for U?iio ovalis (iray, 

 which equals U. tumidus var. ovalis Mont. 



Very beautiful specimens occur in the canal at Barton, near 

 Manchester (T.R.), 

 TInio pictorum L. Several line specimens have been taken by Air. 



F. C. Long from the canal at Burnley. 

 Unio margaritifer L. 



' In the autumn of 1849 I visited the river Lune. At a place 

 called Caton, about five miles from Lancaster, I found these 



Naturalist, 



