270 



W. D. ROEBUCK : LINCOLNSHIRE MOLLUSCA. 



Sphseriuin corneum (L.). 



Plentiful in various localities in the neighbourhood of Louth and 

 Alford, Sutton, Saltfleetby and Wioot; and in the South at Lincoln 

 and Anwick. 



North Lincolnshire. — Plentiful in the canal near Louth, April 15th, 1886 ! 

 (W. D.R.)- Sloothby. near Alford, two, August 4th, 1886! (J. E. Mason). 

 Bradley's Paddock, Chapel, several, August i6th, 1886 ! E. Mason). 

 Alford ! (J. E. Mason, April 1885). Dike near Railway Station, Saltfleetby, 

 one ! (H. W. Kew, 16, iv, 87). Ditch alongside Black Bank Drain, a few, 

 April 14th, 1883! (W.D.R.). Sutton, one! (H. W. Kew, 16, iv, 87). 

 Pond near Maltby Wood, several ! (H. W, Kew. 13, v, 87). Large pond 

 in post-glacial valley by Haugham Wood ! (H. W. Kew, 7, vi, 87). 



South Lincolnshire. — Rejectamenta from between Bracebridge and Lincoln, 

 December 1884 ! (C. T. Musson). Rejectamenta of dike, Anwick. near 

 Sleaford, two, March 7th, 1887 ! (C. T. Musson). 



Sphaerium rivicola (Leach). 

 We have but a single record for this species, in South Lincolnshire. 



South Lincolnshire. — Rejectamenta from between Bracebridge' and Lincoln, 

 December 18S4! (C. T. Musson). 



Sphserium lacustre (Miill). 

 Is on record for three stations only, all near Louth. 



North Lincolnshire. — Pond, Raithby, near Louth, one ! (H. W. Kew, 16. iv, 87). 

 Benniworth Haven, near Louth, one, without cap I (H. W. Kew. 7, vi, 87). 

 Pond in post-glacial valley by Plaugham Wood, a few, juv. ! (Id.). 



Pisidium amnicum (Miill.). 

 We have but a single record — for the Southern division only. 



South Lincolnshire. — Rejectamenta from between Bracebridge and Lincoln, 

 December 1884! (C. T. Musson). 



Pisidium fontinale (Drap.). 



Has occurred in both divisions of the county. 

 North Lincolnshire. — Pond at Raithby near Louth, one, juv.! (H. W. Kew, 



16, iv, 87). Welton Vale, near Louth, one ! (H. W. Kew, 13, v, 87). 

 South Lincolnshire. — Rejectamenta from between Bracebridge jp.nd Lincoln, 



December 1884! (CT. Musson). 



Pisidium roseum Scholtz. 



North Lincolnshire.— Brick-pit, Donington-on-Bain ! (IL W. Kew, 7, vi, 87). 



Pisidium pusillum (Gmel.). 

 Occurs in several places near Louth and Alford, and in the South 

 it is on record for Lincoln. 



North Lincolnshire. — Rejectamenta of Main Drain, Chapel, one ; also one on 

 caddis-case, August 20th, 1886 ! (J. E. Mason). Greenfield Wood, Ail by 

 parish, several, June 8th, 1887! (J. E. Mason). Pond, North Somercotes 

 Warren, numerous! (H. W. Kew, 16, iv, 87). South Elkington brick-field, 

 near Louth, several ! (H. W. Kew, 13. v, 87). Pond at Grimoldby, near 

 Louth, one ! (Id.). Pond at Raithby, near Louth ! (H. W. Kew, 7, vi, 87). 



N.ituralist, 



