Jackson : biklIographv op' non-mariNe moi.lusca of Lancashire. 151 



1 90 1. Collier, E. — Exhibits. J. Conch., x., p. 54. 



Sinistral and scalariform Helix nemoralis from Blackpool district. 

 1901. Taylor, F. — Exhibits. J. Conch., x., p. 54. 



Physa heterostropha from canal at Guide Bridge. 

 1901. Heathcote, W. H. — Exhibits. /. Conch., x., p. 87. 



Hyalinia glabra and Hy. cdlaria from Grange-over-Sands. 



1 90 1. Cairns, R. — Exhibits. J. Conch., x., p. 88. 



Limnxa stagnalis with reflexed lip from Hurst, Ashton-under-Lyne. 

 1 90 1. Collier, Hdward. — Reversed Helices recently found in 

 Lancashire. J. Conch., x., p. 91. 



Helix nemoralis m. sinistrorsum from Blackpool and Southport ; 

 Helix aspersa m. sinistrorsum from Little Layton near Blackpool, and 

 from Southport. Scalariform examples of Helix nemoralis also found 

 (all coll. R. Drummond, of Blackpool). 



1901. Kennard, A. S.— Exhibits. Proc. Malac. Soc, iv., p. 186. 

 Living Physa heterostropha and Planorbis dilatatus from Dukin- 

 field (Ashton ?), Lancashire. 



1 90 1. Kennard, A. S. and B. B. Woodward.— The Post- 

 Pliocene Non-Marine MoUusca of the South of England. 

 Proc. Geol. Assoc, xvii., pt. 5, Nov., 1901. 

 Planorbis dilatatus and Physa heterostropha in Lanes., referred to 

 at p. 249. 



1 90 1. Step, Edward. — Shell Life. London. 

 Lancashire references at pp. 108 and 324. 



1902. Jackson, J. W[ilfrid].— Exhibits. /. Conch., x., p. 148. 

 LimncBa peregra, L. glabra, Physa hypnorum, P. fontinale and 



Planorbis spirorbis from ditch at Moss Side, Manchester \ locality 



fast becoming historic. 



1902. Taylor, F. — Exhibits. J. Conch., x., p. 148. 



Sinistral Paludina vivipara from the Bardsley Canal. 

 1902. Jackson, J. W[ilfrid]. — Exhibits. J. Conch., x,, p. 149. 



Planorbis corneus, and eroded form of Limncea stagnalis^ from 

 pond at Moss Side, near Manchester. 

 1902. Baldwin, J. W. — Exhibits. /. Conch., x., p. 149. 



Limncea stagnalis from Bolton Canal and from ponds at Little 

 Lever. 



1902. Jackson, J. W[ilfrid].— Report on the Guide Bridge and 

 Dukinfield Ramble, September 7th, 1901. /. Conch., x., p. 179. 



Physa heterostropha ; Planorbis dilatatus and numerous other 

 species noted. 

 1902. Jackson, J. W[ilfrid]. — Exhibits. /. Conch., x., p. 2.15. 



Sphcerium pallidum from pond at Droylsden. 



