LAND AND FRESHWATER MOLLUSC A OF SUSSEX. 389 



Valvata piscinalis, Miiller. — Ditches, canals, and sluggish 

 streams ; generally distributed. Mr. W. Jeffery once took " about 

 three hundred and fifty shells from the stomach of a large Eel, 

 nearly all of which belonged to this species." 



Var. albina, Jeffreys. — Lewes (C. H. Morris), Litlington, near 

 Eastbourne (A. G. Stubbs). 



V. macrostoma, Steenb. (Plate IV.)*" — This species closely 

 resembles the var. depressa of V. piscinalis (a variety which 

 differs from type in the very depressed spire and broad umbilicus), 

 but Mr. Edward Collier and others note that it is quite different 

 in texture and colour of shelL It has been taken by Mr. Collier 

 in Mailing Marsh (Journ. Conch, xiii. 285, 316), and at Chidham 

 and Pevensey Levels by the Eev. W. A. Shaw. 



V. cristata, Miiller. — Generally distributed. 



Assemania gray ana, Leach. — This species is included by Mr. 

 Frederick Dixon in his ' Geology and Fossils of the Tertiary and 

 Cretaceous Formations in Sussex' (1850), in a list of the "more 

 obvious examples " of shells found in the post-Pliocene deposits 

 at Bracklesham Bay, and named for him by Mr. G. B. Sowerby 



(p. 17). 



Pomatias elegans, Miiller (= Cy do stoma elegans, Miiller). — 

 Widely diffused, abundant on the chalk, absent from the Vectian 

 sands about Blackdown. The Bev. W. A. Shaw has found it in 

 a post-Pliocene deposit at Kingley Vale, West Stoke. 



Var. ochroleuca, Moquin-Tandon. — Always with the type 

 about Shoreham, Lewes, and Steyning (Bev. C. E. Y. Kendall) ; 

 Heyshott Down (E. W. S.). 



Acicula lineata, Draparnaud. — Apparently very rare. Mr. 

 Balph Tate found it in Fairlight Glen and Coghurst Wood. 

 There are no records from the western division of the 

 county. 



Neritina fluviatilis, Linne. — Very local. " Locally common 

 in the Ouse, Cuckmere and East Bother districts. Plentiful in 

 the Cockshute Stream at Lewes" (J. H. A. Jenner) ; " plentifully 

 in the Arun, a few miles above the town of Arundel" (W. Jeffery) ; 



* Plate IV. — Valvata macrostoma, Steenb. Shells, nat. size (inset) 

 and magnified 6'66, the central one shows the operculum in situ. Planorbis 

 vorticulus, Troschel. Shells, nat. size (inset) and magnified 6*66. From 

 specimens loaned by Mr. Edward Collier. 



