W. D. ROEBUCK : LINXOLNSHIRE MOLLUSCA. 259 



Helix virgata monst. sinistrorsuin Tayl. 

 Dr. Jeffreys (in B.C., vol. 5, 1869) gives New Holland as a 

 locality for this monstrosity, on the authority of Mr. Ball. This is 

 our sole evidence for including the species as a native of the 

 Northern division of the county. 



Helix caperata Mont. 



Common on the coast sand-hills and in chalk-pits further inland, 

 in the vicinity of Alford, Huttoft, and Sutton. Noted in the South 

 at Ancaster and Uffington, in the latter place occurring on old trees. 



North. Lincolnstiire.— Among chalk debris at Claxby, near Alford, one, Septem- 

 ber i6th, 18S5 (T. E.Mason). Coast sandhills, Huttoft, near Alford, numerous, 

 April i6th, 1886 (W.D.R.). Well Vale chalk-pit, near Alford, a few, April 

 14th, 1886 (W.D.R. ), Sandhills, Chapel, parish of Mumby Chapel, a few, 

 July 5th, 1886 (I. E. Mason). Sandhills by coast, Sutton-in-the-.NIarsh. a 

 few, April i6th, 1886 ! (W.D.R. ). Chapel, k few, August 19th, 1886 (J. E. 

 Mason). Swaby Vale, near Alford, one I (H. W. Kew, 13, v, 87). 



South Lincolnshire.— Uffington, on old trees, rather higher in the spire than the 

 Derbyshire ones, not seen (E. Collier). Ancaster village, one, small, April 

 17th, 1886 (W.D.R.). Ermine Street, north of Ancaster Railway Station, a 

 few, April 17th, 1886 (W.D.R.). 



Helix caperata var. ornata Pic. 

 Specimens approaching this variety found with the type on the 

 Huttoft Sandhills, and at Swaby Vale near Alford. 



liTorth Lincolnshire. — Sandhills, Huttoft, near Alford, a few, aft", ornata, 

 16, iv, 86 ! (W.D.R.). Swaby Vale, near Alford, one : H. AV. Kew, 13, v, 87). 



Helix ericetorum Miill. 

 Found in several localities near Louth, Alford, and Saltfleet. and 

 in South Lmcolnshire near Ancaster. One of the Louth specimens 

 was a near approach to var. alba. 



IJorth Lincolnshire. — Louth! (H. W. Kew, i, 86 . Sandhills, Huttoft, near 

 Alford, one, dead, April i6th, 18S6 \ (W.D.R.). Coast sandhills at Saltfleet, 

 one! (H. W. Kew, 16, iv. 87). Well Vale, near Alford, numerous, April 

 14th, 1886: (W.D.R.). Weiton, near Louth, one! (H. W. Kew, 13, v, 87). 



South Lincolnshire. — Ermine Street, north of Ancaster Railway Station, April 

 17th, 1886, a few! (W.D.R.). Ancaster village, one, small, April I7th, 1SS6 ! 

 (W.D.R.). 



Helix ericetorum var. alba Charp. 



North Lincolnshire. — Louth, one, aff. alba : (H. W. Kew. January 1886'. Chalky- 

 bank end of Hubbard's Valley, Louth, one ! (H. W. Kew, 7. vi, 87). 



Helix ericetomm var. minor ^loq. 



ICcrth Lincolnshire.— Swaby Vale, near Alford, one ! (H. W. Kew, 13, v, 87). 



Helix rotundata Miill. 

 An abundant and generally-diffused species, found in numerous 

 localities in the districts round Louth and Alford, and in South 

 Lincolnshire has been noted at Ancaster and Ufhngton. The 

 white variety is on record from Brigg. 



Sept. 1SS7. 



