UNIONIDA. 63 
SPH#RIUM LACUSTRE, Muller. 
In ponds, locally abundant. 
North. 
Bath: Bristol Mus. Coll. 
Bath ; Jenyns. 
Avonmouth and Ham Green; Cundaill. 
“Common in a pond on Clevedon Hill, not far from the 
Royal Hotel” ; Norman. 
Ponds at Bratton St. Maur! 
Weston district; F. A. Knight. 
Keynsham, in stream; Misses Hele. 
South. 
Yeovil; Ponsonby. 
Taunton Canal; W. Gyngell. 
Var. ryckholti, Norman. 
Vauxhall, near Yeovil: J. Ponsonby. 
SPHERIUM PALLIDUM, Gray. 
Apparently a very rare and local species. 
North. 
Kennet and Avon Canal and River Avon; B. B. Wood- 
ward. 
There are specimens from the Bath Canal in the museum 
at Bath. It is also recorded from the Kennet and 
Avon Canal by Stoddart in Leipner’s list. 
Weston district; F. A. Knight. 
PIsIDIUM AMNICUM, Muller. 
Ponds, rivers, and canals. Locally abundant. Messrs. 
Kennard and Woodward record it from an alluvial deposit at 
Castle Cary, and I have seen it in peat at the Glastonbury 
Lake-village. 
North. 
Stream at Penselwood ! 
Ponds at Bratton St. Maur, and Brue below Castle Cary ! 
Weston district ; F. A. Knight. 
Bath; Kenneth McKean. 
Clevedon and Nailsea; Misses Hele. 
Bath; Jenyns Coll. 
Ditches about Shapwick ! 
South. 
No records forthcoming. 
