264 



W. D. ROEBUCK : LIXCOLXSHIRE MOLLUSCA. 



North Lincolnshire. — Wainfleet. abundant in the river ! (A. H. Cooke, April i88^\ 

 Lincoln I (Coll. W. Nelson). Drains, Saltfleetby, common ! (H. W. Kew, 

 August 1SS6). Rejectamenta of Main Drain, Chapel, two, August 20th, 

 18S6 1 (T. E. Mason). Gravel Drain, near Wroot, one, dead, April 14th, 

 iSS3_: (W. Eagle Clarke). 



South Lincolnshire. — Rejectamenta from between Bracebridge and Lincoln, 

 December 1SS4 I (C. T. Musson'. Rejectamenta of dike, Anwick, near 

 Sleaford. a few. March 7th, 1SS7 I (C. T. Musson^. Crowland Wash, July 

 1SS6 : (T. W. Bell). 



Paludina contecta var. virescens Jeff. 



North Lincolnshire.— Brigg (T. Ball). 



BytMnia tentaculata (L.). 



An abundant species in numerous stations about Wroot, Louth, 

 Alford, and Boston, in the Northern division, and in the Southern at 

 Lincoln, Boston, Anwick, and Crowland. 



North Lincolnshire. — Plentiful in the Louth Canal. April 15th, 1SS6 ! (W.D.R. 

 and H. W. Kew\ Sloothby, near Alford, a few, August 4th, 1886 ! (J. E. 

 Mason). Candy Hall Bridge, common ! April 14th, 18S3 (W.D.R.). Re- 

 iectamenta of ^Lai^. Drain at Chapel, August 20th. 1SS6. a few! (J. E. Mason). 

 Sutton, a few I (H. W. Kew, April 1SS7). Ditch alongside Black Bank 

 Drain, common, April 14th, 1SS3 ! (W.D.R.). Theddlethorpe, one I (H. W. 

 Kew, 16, iv, 87). Bradley's Paddock, Chapel, a few, August i6th, 1886 I 

 (J. E. Mason). Skirbeck, several, September 8th, 1884 ! (W.D.R.). Farles- 

 thorpe, a few. May 25th, 1887 I (J. E. Mason). Ditches, Sampson's Lane, 

 near Wroot. common, April 14th, 1883 I water charged with iron (W.D.R.). 



South Lincolnshire. — Rejectamenta from between Bracebridge and Lincoln, 

 December iSS4liC. T. Musson). Near Boston, common, September 8th, 

 18S4 : (W.D.R.). Crowland Wash, July 1886! (T. W. Bell). Anwick. near 

 Sleaford, rejectamenta of dikes, a few, March 7th, 18S7! (C, T. Musson). 



Bythinia tentaculata var. producta. ^Menke. 



North Lincolnshire.— Bradley's Paddock, Chapel, one, August i6th, 1886 ! 

 (T. E. Mason), Reiectamenta of Main Drain, Chapel, one, August 20th, 

 1886 : (J. E. Mason)'. 



BytMnia leacMi (Shepp.). 

 Has occurred near Sutton, Mablethorpe, and Chapel, and in 

 South Lincolnshire near Lincoln and Boston. 



North Lincolnshire. — Sntton-in-the-Marsh, several in drains at land-foot of sand- 

 hills I April i6th, 1886 (W.D.R.). Rejectamenta of Main Drain, Chapel, a 

 few, August 20th, 1886 1 (J. E. Mason). Drains, Mablethorpe, two 1 (H. W. 

 Kew. 19. viii. 86), " ^ 



South Lincolnshire. — Rejectamenta from between Bracebridge and Lincoln, 

 December 1SS4 I (C. T. Musson). Near Boston, one, September 8th, 1884 ! 

 (W.D.R.). 



Valvata piscinalis (Miill.). 

 Xot uncommon in a few localities near Wroot, Sutton, Chapel, 

 and Louth, and in the South near Boston and Lincoln. 



North Lincolnshire.— Plentiful in the canal near Louth, April 15th, 1886 ! (W.D.R.). 

 Gravel Drain near Wroot. one, April 14th, 1883 ! (W.D.R, 1. Black Bank 

 Drain at Candy Hall Bridge! common, April 14th, 1883 (W D. R.). Rejecta- 

 menta of Main Drain, Chapel, a few, August 20th, 1886! (J. E . Mason) . 



Naturalist, 



