A HISTORY OF NORFOLK 



CochlUopa lubrica (MuU.) 

 Caciitanella acicula (Mull.) 

 Pupa cylindracea (Da C.) 



— muscorum (Linn.) 

 Sphyradium edentulum (Drap.). 



wood at Costessey 

 Vertigo antivfrtigo {Drap.). Rare: Castle Rising 



— substriata (JefF.). Bawsey, near Diss 



— pygrneea (Drap.) 



— pusil/a, Mull. Earlham and Bowthorpe 



near Norwich 

 Ba/ea perversa (Linn.). Thorpe near Norwich 

 Clausilia laminata (Mont.). Costessey ; Fram- 



lingham (one specimen) 



— bidentata (Strom.) 

 Succinea putris (Linn.) 



— elegans, Risso 



Amphipeplea glutinosa (Mull.). Norwich 

 Planorbis corneus (Linn.) 



— albus. Mall. 



— glaber, JefF. River at Heigham 

 Rare : in a — nautileus (Linn.). Local 



— carinatus, MuU 



By railway bridge 

 Norwich 



b. Basommatophora 



Carych'tum minimum, Mull. 

 Leuconia bidentata (Mont.) 



over Ouse, Lynn 

 Ancylus fluviatilis (Mull). 

 Velletia lacustris (Linn.) 

 Limnaa auricularia (Linn.) 



— pereger (Mull.) 



— palustris (Mali.) 



— truncatula (Mall.) 



— stagnalis (Linn.) 



— glabra (Mall.). Reffley, North Runcton 



near Lynn 



— marginatusy Drap. 



— vortex (Linn.) 



— spirorbis, MUU. 



— contortus (Linn.) 



— fontanus (Lightf.) 



— iineatus (Walker). 



Lynn, Thorpe 

 Physa fontinalis (Linn.) 



— hypnorum (Linn.). 



Local : Whitlingham, 



Rare : Thorpe, St. 



Germans, Yarmouth 



n. prosobranchiata 



Paludestrina ventro$a (Mont.). Breydon 



— stagnalis (Bast.). Breydon, Wells 

 Bithynia tentaculata (Linn.) 



— leachii (Shepp.) 

 Vivipara vivipara (Linn.) 



— contecta (Millett) 

 Valvata piscinalis (MuU.) 



— cristata. Mall. 



Pomatias elegans (MUll.). Whitlingham Wood, 



Drayton near Norwich 

 Acicula lineata (Drap.). Very rare : Caistor 



Wood 

 Neritina Jluviatilis (Linn.) 



Dreissensia polymorpha (Pall.). 

 Unio pictorum (Linn.) 

 Anodonta cygnaa (Linn.) 

 Spharium comeum (Linn.) 

 — lacustre (MuU.) 

 Pisidium amnicum (MuU.) 



B. PELECYPODA 



Breydon 



Pisidium pusillum (Gmel.) 



— nitidum, Jenyns. Rare : near Thetford 



— fontinale (Drap.). Common. The var. 



henslowiana has been taken at Lynn 



— milium (Held.). Rare : West Winch, St. 



Germans, Old Lakenham near Norwich 



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