14 LYMN^CEA. 



lUust. Couch., p. 30, pi. 15, f. 27, 28; lb,, First Ed., pi. 42, f. 

 27, 28; Helix glutinosa, Montagu, Test. Brit., p. 379, pi. 16, 

 f. 5; Fleming, Edin. Ency., VII, p. 81 ; Brown, Ency. Brit., 

 VI, p. 461 ; Myivas Midleri, Leach, Moll., p. 149 ; Buccinum 

 glutinosum, Miiller, Verm., II, p. 129. 



Shell suborbicular, very thin, diaphanous, shining, smooth, 

 or obsoletely wrinkled longitudinally, and of a pale yellowish 

 horn colour ; body extremely large, much inflated ; spire very 

 small, consisting of three volutions, hardly rising above the 

 body, well defined by the suture, and terminating obtusely ; 

 aperture oval, very large, extending nearly the whole length of 

 the body ; outer lip excessively thin ; destitute of an umbilicus 

 on the pillar. 



Found in ditches in England, Ireland, and Scotland. 



2. AmPHIPEPLEA LACUSTRIS, pi. Ill, f. 5, 6. 



Gulnaria lacustris, Leach, Moll., p. 146? Brown, Illust. 

 Conch., p. 30, pi. 15, f. 24, 25; Lymntsa lacustris, First Ed., 

 pi. 42, f. 24, 25. 



Shell subovate, extremely thin, pellucid, and shining, of a pale 

 yellowish horn colour ; body very large, and inflated ; spire ex- 

 cessively short, consisting of two small volutions, which hardly 

 rise above the body, superior one blunt at the apex ; aperture 

 suboval, a little narrowed above ; outer lip thin, expansive, with 

 its base rounded ; inner hp a little reflected on the columella, 

 with a slight subumbilicus behind it. 



I found this species in Loch Leven, Kinrossshire, Scotland. 



It differs from the preceding species, in being larger and 

 thicker, the spire having but two volutions, in the aperture 

 being not so large and expanded, and in the base of the lip 

 being more rounded. 



In Lady Jardine's cabinet, at Jardine Hall, Dumfriesshire. 



Genus VII.— PHYSA.— Drapernaud. 



Shell sinistral, or with the volutions turning in a contrary 

 direction to the ordinary course, oval, or oblong, very thin, and 

 polished ; spire usually prominent ; aperture longitudinal, ovate, 

 or oblong, contracted above ; outer lip very thin, and acute, 

 partly obtruding above the plane of the aperture; inner lip 

 reflected on the columella. 



