LAND AND FRESHWATER MOLLUSC A OF SUSSEX. 387 



are specimens in the Eufford collection, Hastings Museum, also 

 a scalarid example. 



P. vorticulus, Troschel. (Plate IV.) — It bears much resem- 

 blance to immature P. vortex, but the body whorl is only very 

 slightly keeled. Until recently in this country it was known 

 only from Pleistocene deposits at West Wittering (Messrs. B. B. 

 Woodward and A. Santer Kennard). In 1911 it was found 

 sparingly in the living state in Mailing Marsh, near Lewes, 

 and Pevensey Levels by Mr. Edward Collier. 



P. spirorbis, Linne\ — Common. Mr. Clement Eeid notes 

 that this species and P. vortex occur in the mist ponds on the 

 Downs. 



Var. albida, Nelson. — Lewes (C. H. Morris). 



P. contortus, Linne. — Widely distributed in ponds and ditches. 



Var. albida, Jeffreys. — Lewes (C. H. Morris); Pevensey 

 Marshes (Be v. W. A. Shaw). 



P, fontanus, Lightfoot (= P. nitidus, Miiller, of Jeffreys). — 

 Generally distributed in ponds and sluggish waters. 



Segmentina nitida, Miiller (= Planorbis lineata, Walker). — A 

 local species. Abundantly distinctive in the Nautilus-like septa. 

 About Lewes (Borrer, and many others) ; Winchelsea (A. J. 

 Alletsee) ; Pevensey Marshes (A. G. Stubbs, and many others) ; 

 pond between Hurst Green and Lamberhurst (T. D. A. Cockerell) ; 

 in a pond at Old Deane Farm, Henfield (W. Borrer) ; Harting 

 (Weaver). 



Physafontinalis, Linne\ — Generally distributed. 



Aplecta hypnorum, Linne'. — A local species. Pevensey Levels 

 (E. A. Butler and others) ; Barcombe (Jenner) ; Bopeep and 

 Guestling (Bev. E. N. Bloomfield) ; stream at Wellingham and 

 at Leighside (Eastbourne Nat. Hist. Soc.) ; Winchelsea and 

 Snailham (Craven) ; Batham, near Chichester, and Lindfield 

 (W. Jeffery) ; near Pulborough (E.W. S.) ; Singleton, Chidham, 

 and Bosham (Bev. W. A. Shaw). 



Paludestrina confusa, Frauenfeld. — It occurs in the Pleistocene 

 deposits at West Wittering, where it was first detected by Mr. 

 Clement Eeid. Begarding it as synonymous with Pseudamnicola 

 anatina, Drap., Mr. Craven records it as common at Winchelsea 

 and Snailham (' Hastings and East Sussex Naturalist,' ii. 101, 

 April, 1914). 



