MOLLUSCS 





Velletia lacustrts (Linn.) 

 Limntea aurlcularia (Linn.) 



pereger (Mull.) 



palustris (Mull.) 



truneatula (Mall.) 



stagnalis (Linn.) 



glabra (Mttll.) One specimen from river 



Leen, Bulwell 



Amphipeplea glutinosa (Mull.) Pond between 

 Beeston and Attenborough ; Beeston 

 Lock, in backwater of Trent 



Planorbis corneus (Linn.) 



albus, Mall. 



glaber, Jeff. Thoresby Lake ; Clumber ; 



Cresswell 



nautileus (Linn.) 

 - carlnatus, Mall. 



marginatuS) Drap. 



vortex (Linn.) 



spirarb'tSy Mull. 



Planorbis contortus (Linn.) 



fontanus (Lightf.) 



lineatus (Walker) Oxton ; Highfield 



House Lake 

 Physa fontlnalis (Linn.) 



hypnorum (Linn.) Beeston Rylands ; Wil- 



ford ; Lenton Meadows ; Worksop 



II. PROSOBRANCHIATA 



Bithynia tentaculata (Linn.) 



leachii (Shepp.) 

 Vivipara vivipara (Linn.) 



contecta (Millett) Dyke, Notts side of 



river Idle 

 Valvata piscina/is (Mall.) 



cristata, Mall. Local 



Aclcula lineata (Drap.) Rejectamenta, Cress- 

 well Crags 

 Neritina fluviatllh (Linn.) 



B. PELECYPODA 



Dreissensia polymorpha (Pall.) 

 Unto pictorum (Linn.) 



tumidus, Retz. 

 Anodonta cygneea (Linn.) 

 Sph&rium rivlcola (Leach) 



corneum (Linn.) 



ovale (F^r.) Nottingham Canal ; Marn- 



ham 

 lacuitre (Mall.) 



Pisldium amnicum (Mall.) 



pusillum (Gmel.) 



nitidum, Jenyns. 



fontinale (Drap.) Besides the type, the 



var. hendowiana occurs at Retford and 

 Shireoaks, and the var. pulchella at 

 Beeston, Stanton and Thoresby Lake 



mlllum (Held.) Clumber Lake ; Mans- 



field ; Attenborough 



77 



