262 



W. D. ROEBUCK : LINCOLNSHIRE MOLLUSCA. 



Clausilia rugosa (Drap.). 



A common species, recorded for numerous localities in the Louth 

 and Alford districts. The only record for the Southern division is of 

 the var. tuinidida at Uffington. 



North LincolnsMre.— Muckton Chalk-pit, a few, April 15th, 1886! (W.D.R.)> 

 Burwell, one, April 15th, 1886! (W.D.R. )• Well Vale, near Alford, 

 numerous, April 14th, 1886 ! (W.D.R.). Sloothby, one, August 4th, 1886 1 

 (J. E. Mason). Well Vale Chalk-pit, near Alford, numerous, April I4ih, 

 1886 1 (W.D.R.). Grimoldby, one ! (H. W. Kew, 13, v, 87). Tothby, nenr 

 Alford, a few, April 14th, 1886! (W.D.R.). Rejectamenta of Main Drain, 

 Chapel, a few, August 28th, 1886 ! (J. E. Mason), Haugham Wood, ne r 

 Louth, a few, April 15th, 1886! (W.D.R.). Haugham Pasture, one! 

 (H. W. Kew, 13, V, 87). Rigsby, several, March 3rd, 1887 ! (Isabel Mason). 

 Greenfield Wood, Ailby parish, a few, June 8th, 1887! (J. E. Mason). 

 Hubbard's A'alley, near Louth, one! (H. W. Kew, 13, v, 87). Louth Park, 

 one ! (H. W. Kew, 7, vi, 87). 



Clausilia rugosa var. tumidula Jeff. 



South Lincolnshire. — Uffington, near Stamford, on old trees that had been felled 

 and allowed to lie two or three years — a good number found of this variety ! 

 (E. CoUier, September 1885). 



Clausilia laminata (Mont.). 



Not uncommon in various woodland localities near Louth and 

 Alford. Recorded also for Uffington in the Southern division. 



North Lincolnshire. — Well Vale Chalk-pit, near Alford, numerous, April 14th, 

 1886 (W.D.R.). Well Vale, near Alford, numerous, April 14th, 18S6 

 (W.D.R.). Haugham Wood, near Louth, numerous on a fallen tree, 

 April 15th, 1886 (W.D.R.). Maltby Wood, near Louth, a few, April 15th, 

 1886 (W.D.R.). Haugham Pasture, a few ! (H. W. Kew, 13, v, 87). 



South Lincolnshire. — Uffington, near Stamford (E. Collier, September, 1885). 



Clausilia rolphii Gray. J 

 This interesting species has been found within the past fevvl 

 months in three distinct localities in a post-glacial ravine near Louth. 

 The record is of great importance from the very limited and local 

 distribution of the species in Britain. The nearest districts in which 

 it occurs are Warwickshire and Gloucestershire. 



North Lincolnshire. — Haugham Pasture, near Louth, one ! (H. W. Kew, 13, v, 87). 

 Maltby Wood, near Louth, one ! (Id.). Grisel-bottom, Burwell Wood, near 

 Louth, one! (H. W. Kew, 7, vi, 87). 



Zua lubrica (Miill.). 

 Not uncommon and a generally diffused species in the.J'.outh, 

 Alford, and Sutton districts, but has not as yet been placed on record 

 for South Lincolnshire. 



North Lincolnshire. — Among chalk debris, Claxby, Alford, one juv., Sep- 

 tember i6th, 1885! (J. E. ]\Iason). Tothby. near Alford, under logs, farm- 

 yard, a few, April 14th, 1886! (W.D.R.). Chapel, one, August 19th, 1886 ! 

 ([. E. Mason). Muckton Wood, near Louth, one juv., April 15th, 1886 1 

 (W.D.R.\ Well Vale, numerous, April 14th, 1886! (W.D R.). The Park, 

 Bilsby, near Alford, May 5th, 1886, one ! (J. E. Mason). Haugha m Pasture, 



Naturalist, 



