PEARCE AND MAYFIELD : MOLLUSCA OF EAST NOKFOLK. 40I 



Var. margaritana Esm. Heigham (A.M.); Acle (S.S.P.). 

 Var. Candida Porro { = allnda Lister Peace). Ditch by side 

 of New Cut near Reedham (S.S.P.). 



L. auricularia L. Generally distributed, especially in the 

 rivers and larger streams. River Yare between Norwich 

 and Brundall, in the Bure above Acle Bridge, Thurne 

 Stream, Heigham Sounds, Old Meadow Dyke (S.S.P.) ; in 

 the River Wensum at Heigham and Hellesdon (A.M.). 



L. stagnalis L. Plentiful. i\cle, Bramerton, Whitlingham 

 Marsh, Stoke Holy Cross (S.S.P.) ; Old Lakenham, Earl- 

 ham, Weston, etc. (A.M.). 



L. palustris (MiilL). Common in the marshes. Bramerton, 



Whitlingham, Brundall, Buckenham, Reedham, near Acle 



(S.S.P.) ; Colney, Thorpe, Postwick, Costessey, etc. (A.M.). 



Var. tincta Jeff. Not uncommon with type at Brundall, 



Reedham (S.S.P.). 

 Var. nov. carinata. Shell with body-whorl strongly 

 keeled. Occurs with type and the var. tiiicta in a ditch by 

 the side of the New Cut, Reedham (S.S.P.). 



L. truncatula (MiilL). On the banks of the Yare at Bramer- 

 ton, in ditches on Costessey Common (A.M.). 



Ancylus fluviatilis Miill. On stones and water-lily leaves 

 in the River Wensun at Hellesdon (A.M.). 



Velletia lacustris (L.). On Nupliar Itayes,, etc. At Brun- 

 dall, Whitlingham, Surlingham, in the Yare, and at Acle 

 and Heigham Bridge (S.S.P.) ; River Wensum at Heigham 

 and Hellesdon (A.M.). 

 Var. compressa (Jeff). At Brundall, in the River Yare 

 (S.S.R). 



Cyclostoma elegans Miill. Rare. In Whitlingham Woods ; 

 on a hedge-bank at Drayton (A.M.). 



Neritina fluviatilis (L.). In the River Yare at Surlingham 

 Ferry and Brundall, in the Bure between Salhouse Broad 

 and Horning, also in Old Meadow Dyke, Thurne Stream, 



