4 Quarterly Journal of Conchology. 



Valvata piscinalis var. subcylindrica Jeffr. — River 

 Went, near Ackworth. 



Planorbis nitidus Midler. — Found at Kirkthorpe and 

 Hemsworth. 



Planorbis nautileus L. — Common at Ossett and Cold 

 Hiendley. 



Planorbis nautileus var. cristata Draparnaitd.—OQ.Q.\xx--, 

 with the type. 



Planorbis albus Mailer. — Various places round Wakefield. 

 Planorbis albus var. Draparnaldi Shepp. — Very fine 

 specimens of this local variety from a pond at Sandal. 



Planorbis spirorbis Midler. — Common throughout the 

 district. A beautiful white variety occurs at Dirtcar 



Planorbis vortex L. — Very common throughout the 

 district, with P. spirorbis. 



Planorbis carinatus Midler. — Common in the Wakefield 



and Barnsley canal. A dwarf form occurs in a pond nr. Sandal Castle. 



Planorbis complanatus Z. — Common throughout district. 



Planorbis corneus L. — Abundant in a pond at Castleford. 



Evidently introduced. 



Planorbis contortus Z. — Very abundant in ponds at 

 Castleford and near Frystone Hall. 



Physa hypnorum Z. — Common in a ditch at Stanley, 

 where the specimens are very fine ; more rarely at Cold Hiendley. 

 Very common at Horbury. 



Physa fontinalis Z. — Common in the Barnsley canal, and 

 in nearly every stream throughout the district. 



Physa fontinalis var. oblonga Jeffr. — Common in the 

 River Went at Ackworth. 



Limnaea peregra Midler. — In a ditch at Stanley, common. 

 Limnaea peregra var. ovata Drapamaud. — Barnsley canal. 

 Other forms of this most variable species occur throughout 

 the district. 



Limnaea auricularia Z. — Occurs in canals at Horbury and 

 Walton, and in the Cold Hiendley and Hemsworth dams. 



Limnasa stagnalis Z. — Barnsley canal. Very fine speci- 

 mens at Kirkthorpe. 



Limnaea stagnalis var. fragilisZ. — Abundant in a stream 

 near Castleford. 



Limnaea palustris Midler. — In a pond on the canal side 

 near Heath Bridge. 



Limnaea palustris var. el on gat a /^/r. — Occurs in the 

 same pond. 



Limnaea palustris var. t'lncta Jeffr. — Barnsley canal. 

 Limnaea truncatula J/?-;//^;.— Common in ditches through- 

 out the district. 



Limnaea truncatula var. elegans Jeffr. — Standbridge, 

 near Sandal. 



Limnaea glabra MuUer. — Very abundant in a pond at 

 Havercroft where the specimens are small. Common near Ossett. 



