MOLLUSCS 



Vertigo minutissima, Hartm. Maidstone 

 (scarce) 



— substriata (JefF.). Westerham ; rejecta- 



menta of river Stour 



— pygmtea (Drap.) 



— angustior^ JefF. Ightham 



Balea perversa (Linn.). Maidstone (scarce) ; 



Sevenoaks ; Downe 

 Clausila lam'inata (Mont.) 



— bidentata (Strom.) 



— rolphii. Gray. Local 

 Succinea putris (Linn.) 



— elegans, Risso. Greenhithe ; Deal 



b. Basommatophora 



Carychium minimum, MqII. 



Alexia myosotis (Drap.). Erith ; river Stour, 



Richborough 

 Leuconia bidentata (Mont.). Rejectamenta of 



river Stour, Richborough 

 Jncylns fuviatilis, Mull. 

 Velletia lacustris (Linn.) 

 Limncea auricularia (Linn.) 



— pereger (Mull.) 



— palmtrii (Mull.) 



— truncatula (Mall.) 



— stagnalis (Linn.) 



— glabra (Moll.). Erith 



Amphipeplea glutinosa (Mull.). Sandwich ; 



Deal 

 Planorbis corneus (Linn.) 



— albus. Mull, 



Planorbis glaber, Jeff. Thames Marshes ; 

 Paddock Wood 



— nautileus (Linn.) 



— carinatus, Miill. 



— marginatus, Drap. 



— vortex (Linn.) 



— spirorbis, Milll. 



— contortus (Linn.) 



— fontanus (Lightf.) 



— lineatus (Walker). Sandwich ; Deal 

 Physa fontinalis (Linn.) 



— hypnorum (Linn.). Local 



IL PROSOBRANCHIATA 



Paludestrina confusa (Frau.). Thames Marshes 

 (almost, if not quite extinct) 



— jenkinsi (Smith). Thames Marshes below 



Crossness ; rejectamenta of river Stour ; 

 Hythe (one dead specimen) 



— ventrosa (Mont.). Erith ; Ramsgate 



— stagnalis (Bast.). Thames marshes and 



dykes around the coast 

 Bithynia tentaculata (Linn.) 



— leachii (Shepp.) 

 Vivipara vivipara (Linn.) 

 Valvata piscinalis (Mull.) 



— cristata, Mali. 



Assiminea grayana, Leach. Thames Marshes ; 



Sandwich 

 Pomatias elegans (Miill.) 

 Acicula lineata (Drap.). Folkestone 

 Neritina fluviatilis (Linn.). River Medway 



B. PELECYPODA 



Unio pictorum (Linn.) 



— tumidus, Retz. 

 Anodonta cygncea (Linn.) 

 Sphierium rivicola (Leach) 



— corneum (Linn.) 



— lacustre (Mall.) 



udium amnicum (Mull.) 

 pusillum (Gmel.) 

 nitidum, Jenyns. Chislehurst 

 fontinale (Drap.). Ebbsfleet. 

 milium (Held.). Keston ; Heme Bay 



