24O JOURNAL OF CONCHOLOOY, VOL. 9, NO. 8, OCTOBER, 1899. 



*Viviparus viviparus L. — Very local. We have seen examples 

 from Dunster, near the castle ; otherwise it has only been recorded 

 for the neighbourhood of Bath ; Avon Canal (Bath Mus. and Bristol 

 Mus.). 



Var. efasciata Pickering. — Bath Canal (Bristol Mus.). 

 Bythinia tentaculata L. — Common in ditches and the rhines 

 on the moors; Jenyns coll. (Bath Mus.); Weston-super-Mare and 

 Yatton (Bristol Mus.). 



Var. ventricosa Menke. — Bristol (Jeffr.). 



Var. rufescens Ckll. — Rejectamenta of Brue below Castle 

 Cary ; and from ditches bordering on the river Cale at Harwood 

 below Wincanton (E.W.S.). 



Bythinia leachii Shepp. — Local. In the larger and clearer 

 streams ; abundant and fine in West Mead Rhine, Yatton (Norman); 

 Kenn Moor and river Avon (Cundall) ; Weston-super-Mare (Crotch); 

 near Clevedon (Bristol Mus.) ; Pennard Moor, Glastonbury (E.W.S.). 

 Valvata piscinalis Mull. — Common. Jenyns coll. (Bath Mus.); 

 Yatton (Bristol Mus.). 



Var. acuminata Jeffr. — River Avon, Bristol (Jeffr.). 

 Valvata cristata Mull. — Well distributed in North Somerset; 

 Worle near Weston-super-Mare (Bristol Mus.) ; " very local, a few 

 specimens from a ditch in Kenn Moor, also near Wells " (Norman) ; 

 rejectamenta of the Brue below Castle Cary ; common in rhines on 

 the moors around Glastonbury, and of frequent occurrence in ponds 

 and ditches in the Wincanton district (E.W.S.). 



Unio tumidus Phil. — Apparently confined to the river Avon ; 

 Bath Canal, Jenyns coll. (Bath Mus.) ; Wilson coll. (Bristol Mus). ; 

 Avon and Kennet Canal (Forbes and Hanley, Cundall). 



Var. radiata Colb. — Avon and Kennet Canal (Cundall). 

 Var. ovalis Mont. — River Avon, Bath (Cundall). 

 Unio pictorum L. — Common in the rivers Avon and Brue. 

 Var. radiata Moq. — River Avon, Bristol (Cundall). 

 Var. compressa Jeffr. — Bath Canal (Mrs. Oldroyd). 

 *Anodonta cygnea L. — Frequent in the rivers and the majority 

 of the largest ponds throughout the county ; very fine examples from 

 the Bath Canal are in the Jenyns coll. (Bath Mus.) ; Kennet and 

 Avon Canal and Kenn Moor (Cundall) ; Nailsea Moor and Yatton 

 (Bristol Mus.). 



Anodonta anatina L. — Generally distributed. Avon, Jenyns 

 Coll. (Bath Mus.); Wilson Coll. (Bristol Mus.); common in the 

 rivers Brue and Cale (E.W.S.). 



Var. radiata Mull. — Bath Canal (Bristol Mus.). 

 Var. ventricosa C. Pfr. — Keynsham (Bristol Mus.) 



