HACCHUS : I.ANH AND KKKSHWATRR Mni.I.USCA OF WINSI.EY. 323 



P. cylindracea. — In colonies on walls, Bradford Road and in 

 village ; slightly commoner than inarginata. The majority of speci- 

 mens approach var. curta in form. First record for Wilts. N. 



P. secale. — On base of walls between lower entrance to Sana- 

 torium and Conkwell Road on Winsley Hill (May 15th). 



Sphyradium edentulum. — One, grounds under fallen leaves. 

 (April 25th). 



Balea perversa. — Two under stones on a wall half-way between 

 Bradford-on-Avon and Winsley. 



Clausilia laminata. — Common in grounds on and at foot of 

 beech trees. 



var. albina. — Nearly as common as type. 



C. bidentata. — Very common everywhere, grounds, on walls, etc. 

 vars. gracilior, tumidula, parvula, everetti. At Turleigh 

 forms almost the size of C. rolphii were taken. 



Succinea putris. — Canal bank. 



S. elegans. — Canal bank. 



Carychium minimum.— Common under damp beech leaves in 

 woods. 



Pomatias elegans. — Very common and large; woods, hedge- 

 rows. Colour of shells varied from yellow to purple. 



The following freshwater shells were taken in about 100 yards of 

 the Kennet and Avon Canal at the foot of the Sanatorium grounds : — 



Limnaeaauricularia. — Common ;onespecimen 24 mm. x 30 mm. 



L. pereger. — Common. 



L. palustris. — One specimen only. 



L. truncatula. — Common. 



L. stagnalis. — Common. 



Planorbis corneus. — One specimen only. 



P. carinatus. — (April 3rd). 



P. complanatus. P. spirorbis. P. vortex. 



Physa fontinalis. — (March 30th). Bithynia tentaculata. 



Vivipara vivipara. — Common, some reaching a large size. 



Neritina fluviatilis. — Two specimens only. 



Dreissena polymorpha.— Common. 



Unio pictorum. — Common, but not large. 



U. tumidus. — Two or three dead shells. 



Anodonta cygnea. — Common. Some large. 



A. anatina. — Common. Sphaerium rivicola.— Common. 



S. corneum. S. lacustre. Pisidium amnicum. 



