MGLLtJSCA OF NORTHAMPTONSHIRE. 249 



LIST. 



Sphserium corneum (L.). — Peterborough, Eye, and New- 

 borough, T. W. B. ; the Little Sea, Far Cotton, Northampton, 

 five sent, W.D.C. ; river Nene at St. James' End meadows, 

 two sent, W.D.C. 



Sphserium corneum v.flavescens(Macgill.). — Eye,T.W.B. ; 

 Irchester, one, H.H.S. ; river Nene at St. James' End 

 meadows, with type, W.D.C. 



Sphaerium rivicola (Leach). — In the canal at Far Cotton, 

 first bridge towards Ellsworth, four, W.D.C. 



Sphaerium lacustre (MiilL). — In river Nene at St. James' End 

 meadows, Northampton, one, W.D.C. ; pond at Castle 

 Ashby, on duckweed, two, R.R. 



Pisidium pusillum (Gmel.). — Rejectamentaof river Nene, at 

 St. James' End, Northampton, one, W.D.C. ; Castle Ashby, 

 on duckweed in a pond, seven, June, 1880, R.R. 



Unio tumidus Phil. — River Nene at St. James' End, North- 

 ampton, one, W.D.C. ; canal near Weeton Station, one, 

 W.D.C. ; canal at Far Cotton, W.D.C. 



Unio tumidus v. radiata Colb. — River Nene between Old 

 Sewage Works and Paper Mills, Northampton, two, W.D.C. 



Unio pictorum (L.). — River Nene between Old Sewage Works 

 and Paper Mills, Northampton, three, W.D.C. ; Castle 

 Ashby, one, R.R. 



Anodonta anatina (L.). — River Nene between Old Sewage 

 Works and Paper Mills, Northampton, canal near Weeton, 

 and canal at Far Cotton, seven, W.D.C. 



Anodonta anatina v. radiata Jeff. — River Nene between 

 Old Sewage Works and Paper Mills, Northampton, and in 

 canal, Far Cotton, three, with type, W.D.C. 



Dreissena polymorpha (Pall.). — Canal, Far Cotton near 

 Northampton, plentiful, W.D.C. Mr. Crick informs us that 

 some three or four years ago the canal was diverted by the 

 railway company, and now the stones forming the sides of 

 the new banks are entirely covered with these shells. 



