R. STANDEN : LAND AND FRESHWATER MOLLUSCA. 



shells in abundance. They can be seen from the banks of the 

 river when the water is clear, and lie between the stones in the 

 mud with the ends pointing up' (Dyson's List, 1850). 

 Anodonta cygnea L. Common at Prestwich, and in many ponds 

 about Goosnargh, Farrington, Penwortham, and Whittingham. 

 Very abundant in the Preston Corporation Reservoir at Grim- 

 sargh. Some fine specimens occur in the canals at Tarleton, 

 Carnforth, Newsham, Brock, and Clifton. Very large in the 

 dams and Botany Bay Wood at Worsley. 



' Canals, pits, and ponds throughout the district ' (Hardy's 

 List, 1865). 



* Found in the Park Canal, a large sheet of water in Cheetham ; 

 in Ardwick pond ; in the canal at Hollinwood ; in Dallam 

 Brook, near Warrington, and in most of the ponds in this neigh- 

 bourhood, in the mud. Very fine in a circular piece of water 

 at Smedley, near the Old Hall' (Dyson's List, 1850). 



I think each one of the Moss Lane ponds called Twenty 

 Pits (or Nine Pits), had its own variety (R.D.D.). 

 var. incrassata Shepp. 



Pits at Chorlton, near Manchester (T.R.). 

 var. zellensis Gmel. 



' Pits near Moss Lane' (Hardy's List, 1865). 

 var. rostrata Rossm. 



Pits at Chorlton, near Manchester (T.R.). 

 Anodonta anatina L. Rather rare in Leeds and Liverpool Canal 

 at Tarleton, and near Burnley ( F.C.L.). Mr. Heathcote took a 

 specimen at Tarleton, which closely corresponds with var. cofu- 

 planatd Rossm. Very plentiful in several ponds at Whittingham, 

 near Preston. 



' Cotton pits. Bolton Canal. Very fine in a mill lodge near 

 Gorton' (Hardy's List, 1865). 

 Dreissena polymorpha Pall. Common on sides of bridges in the 

 Lancaster Canal, especially at Woodplumpton, where it is 

 unusually fine, and some curiously distorted specimens occur. 

 Some small but well-marked specimens occur in the river Brock, 

 attached to large stones. 



Abounds in thousands on submerged tree-roots in a reservoir 

 belonging to the Lowerhouse Printworks, near Burnley (F.C.L.). 



Very abundant in canal at Bardsley (T.R.). 



' Old brick-pits, Longford. Canals at Reddish and Bolton ' 

 (Hardy's List, 1865). 



' These shells are found in most of the large waterpipes which 

 supply Manchester, from the waterworks at Beswick. Finding 



May 1887. 



