LIMN HID A. ao 
Streams near Clevedon; Letpner and others. 
Bath Canal; Kenneth McKean. 
South. 
Brympton ; J. Ponsonby. 
Wellington; W. Gyngell. 
PLANORBIS SPIRORBIS, Linné. 
Common in ponds and slow-running streams in the northern 
part of the county, and presumably in the south also. Abund- 
ant amongst duckweed (Lemna), in many rhines on_ the 
Levels. 
South. 
Tintinhull; J. Ponsonby. 
Dulverton ; H. Watson. 
Var. albida, Nelson. 
Pond by roadside, near Penselwood ! 
Var. leucostoma, Michaud. 
Middle Chinnock, Vauxhall and Brympton; J. Ponsonby. 
PLANORBIS CONTORTUS, Linné. 
Frequent in ponds, lakes and ditches. 
North. 
Kenn Moor; Cundall. 
Ashton; EF. C. Wheeler. 
Clevedon ; Leipner. 
Wincanton and Bruton districts ! 
Weston district ; #. A. Knight. 
Amongst Lemna and other floating weeds in rhines about 
Shapwick, Meare, ete. ! 
South. 
Middle Chinnock ; J. Ponsonby. 
Wellington; W. Gyngell. 
Var. albida, Jeffreys. 
Weston-super-Mare ; Jeffreys. 
Yatton; Bristol Mus. Coll. 
Middle Chinnock ; J. Ponsonby. 
Mons., scalariforme. 
“Specimens from a small pond near Walton Old Church 
are distorted, having the whorls irregularly coiled, and 
often folded over each other.” Norman. 
