A HISTORY OF NORFOLK 



Cochlicopa lubrica (MUll.) 

 Ctecilianella acicula (Mull.) 

 Pupa cylindracea (Da C.) 



— muscorum (Linn.) 



Sphyradium edentulum (Drap.). Rare : in a 



wood at Costessey 

 Vertigo antivertigo (Drap.). Rare : Castle Rising 



— substriata (JefF.). Bawsey, near Diss 



— pygmisa (Drap.) 



— pm'tlla. Mall. Earlham and Bowthorpe 



near Norwich 

 Balea perversa (Linn.). Thorpe near Norwich 

 Clausilia laminata (Mont.). Costessey ; Fram- 



lingham (one specimen) 



— hidentata (Strom.) 

 Succinea putrh (Linn.) 



— elegans^ Risso 



b. Basommatophora 

 Carychlum minimum^ Miill. 

 Leuconia hidentata (Mont.). By railway bridge 



over Ouse, Lynn 

 Ancylm fluviatilis (Mull). Norwich 

 Velletia lacustris (Linn.) 

 Limrnea auricularia (Linn.) 



— pereger (Mull.) 



— palmtris (Mull.) 



— truncatula (Mull.) 



— Uagnalis (Linn.) 



— glabra (Mull.). Reffley, North Runcton 



near Lynn 



Amphipeplea glutinosa (Mali.). Norwich 

 Planorbii corneus (Linn.) 

 — albus. Mall. 



glaber, JefF. River at Heigham 



— nautileus (Linn.). 



— carinatus, Mall 



— marginatus, Drap. 



— vortex (Linn.) 



— spirorbis, Mall. 



— contortus (Linn.) 



— fontanus (Lightf.) 



— lineatus (Walker). 



Lynn, Thorpe 

 Physa fontinalis (Linn.) 



— hypnorum (Linn.). 



Local 



Local : Whitlingham, 



Rare : Thorpe, St. 



Germans, Yarmouth 



IL PROSOBRANCHIATA 



Paludestrina ventrosa (Mont.). Breydon 



— itagnalii (Bast.). Breydon, Wells 

 Bithynia tentaculata (Linn.) 



— leacbii (Shepp.) 

 Vivipara vivipara (Linn.) 



— contecta (Millett) 

 Valvata piscinalis (Mall.) 



— criitata. Mall. 



Pomatias e/egans (Mall.). Whitlingham Wood, 



Drayton near Norwich 

 Acicula Uneata (Drap.). Very rare : Caistor 



Wood 

 Neritina fluviatilis (Linn.) 



Dreissensia polymorpha (Pall.). 

 Unio pictorum (Linn.) 

 Anodonta cygnaa (Linn.) 

 Sphisrium corneum (Linn.) 

 — lacustre (Mull.) 

 Pisidium amnicum (Mall.) 



B. PELECYPODA 



Breydon 



Pisidium pusillum (Gmel.) 



— nitidum, Jenyns. Rare : near Thetford 



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



hemlowiana has been taken at Lynn 



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



Germans, Old Lakenham near Norwich 



