250 MOLLUSCA OF NORTHAMPTONSHIRE. 



Neritina fluviatilis (L.). — River Nene near Northampton, 

 J, W. Wood j plentiful in the canal at Cotton End, North- 

 ampton, W.D.C. 



Neritina fluviatilis v. trifasciata Colb. — River Nene near 

 Northampton, J. W. Wood. 



Paludina contecta (Millet). — Eye and Newborough near 

 Peterborough, plentiful, 1880, T.W.B. ; river Nene at Cow 

 Meadow near Northampton, one dead specimen, W.D.C. ; 

 ponds at Castle Ashby, two, R.R. 



Paludina vivipara (L.). — Canal at Cotton End, North- 

 ampton, plentiful, W.D.C. 



Bythinia tentaculata (L.). — Peterborough, Newborough, 

 and Eye, T.W.B. ; plentiful in the brooks connected with 

 the river Nene near Northampton,' W.D.C. 



Bythinia Leachii (Shepp.). — Newborough near Peterborough, 

 T.W.B. 



Valvata piscinalis (Mlill.). — Newborough near Peterborough, 

 T.W.B. 



Planorbis nautileus (L.). — Pond at Castle Ashby, two, R.R. 



Planorbis albus Miill. — Pond at Castle Ashby, two, with last, 

 R.R. ; Peterborough, T.W.B. 



Planorbis spirorbis Mlill. — Rejectamenta of the river Nene 

 at St. James' End, Northampton, three, W.D.C. 



Planorbis vortex (L.). — Peterborough, Eye, and New- 

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

 five, W.D.C. 



Planorbis carinatus Miill. — River Nene at Northampton, 

 W.D.C; canal at Far Cotton, four, W.D.C; Eye and 

 Newborough, T.W.B. 



Planorbis complanatus (L). — Peterborough, Newborough, 

 and Eye, T.W.B. ; river Nene at St. James' End, North- 

 ampton, two, W.D.C. 



Planorbis corneus (L.). — Pond in Hardingstone Fields, 

 Northampton, two, W.D.C. ; canal reservoir at Bramston, 

 four, W.D.C; Peterborough, Eye, and Newborough, T.W.B. 



J.C, iv., Oct., 1884. 



