On 
Or 
PALUDESTRINIDA. 
PALUDESTRINIDZ&. 
PALUDESTRINA VENTROSA, Montagu (= Hydrobia ventrosa, 
Montagu). 
Frequents brackish water at the mouths of rivers. 
Avonmouth ; Cundall. 
Shirehampton, in ditches; 7’. G. Ponton. 
Avon, at Cook’s Folly ; W. W. Stoddart. 
“In marvellous abundance in a ditch near the Pill, 
Clevedon” ; Norman. 
Weston-super-Mare; F. A. Knight. 
PALUDESTRINA STAGNALIS, Baster (= Hydrobia ulve, Pen- 
nant ). 
An inhabitant of brackish waters; abundant in many places 
about Weston-super-Mare and Burnham. Mr. Bolton records 
it from a shell-bearing deposit at Dumball Island, Avonmouth ; 
and Mr. Corder from the Burtle Beds at Wembdon. 
River mouths on the Somerset coast ; Norman. 
Weston-super-Mare, abundant ; Lezpner. 
Weston-super-Mare; F. A. Knight. 
BITHYNIA TENTACULATA, Linné. 
Generally distributed in ditches, streams and sluggish rivers. 
Messrs. Kennard and Woodward record it from an alluvial 
deposit at Castle Cary. It was also found in the peat at the 
Glastonbury Lake-village. 
Var. ventricosa, Menke. 
Bristol ; Jeffreys. 
BITHYNIA LEACHII, Sheppard. 
Similar situations to the above but a much more local species. 
Mr. Bolton found it in a shell-bearing deposit at Dumball 
Island, Avonmouth. 
North. 
“Jn the larger and clearer streams ; abundant and fine in 
West Mead Rhine, Yatton” ; Norman. 
Kenn Moor; Cundall. 
River Avon; Stoddart. 
Weston-super-Mare ; Crotch. 
Weston district; F. A. Knight. 
Near Clevedon; Bristol Mus. Coll. 
