JOURNAL OF CONCHOLOGY. 25 



DESCRIPTIONS OF NEW BRITISH VARIETIES OF 

 FRESHWATER SHELLS. 



By W. nelson. 



[Read before the Conchological Society.] 



Pianorbis nitidus var. albida n. v. Shell white. 



Taken by Mr. Ball at Brigg, Lincolnshire and by 

 myself at Alum Rock, near Birmingham. 



Pianorbis spirorbis var. albida n. v. Shell white. 



Found at Newton near Wakefield, some years ago, 

 by Mr. Wilcock, to whose kindness I am indebted for 



• specimens. 



Physa hypnorum var. major Moq. Shelllarger, iSmill. 

 long. 



Taken by Mr. F. Shrive near Birmingham. 



Physa hypnorum monst. decol latum n. m. Spire decol- 

 lated. 



Ditch at Hesel near Ackworth, S.W. Yorks. 



Limnsea peregra var. Candida Porro. Shell white. 



Taken by Mr. Whitwham at Askern. This variety 

 has been recorded as var. albida by Mr. L. Peace. 



Limnaea auricularia var. magna Colb. Shell larger. 

 Aperture narrower, outer margin nearly parallel to 

 the columella, which is straight, upper edge reaches 

 the commencement of the spire, which is sharp. 

 Length 32 mill. 

 Near London. 



Limneea auricularia var. reflexa n. v. Shell having the 

 outer lip much reflected. 



Found by Mr. Whitwham near Huddersfield and 

 presented to Mr. J. W. Taylor, to whom I am indebted 

 for the opportunity of describing this remarkable 

 variety. 



