UNIVALVES HELIX. 165 



Family S.-Umhilicated aud depressed, aperture ear-shaped, dis- 

 torted, toothed, and sinuated, with a marginated lip. 



Scicntijic Name. Locality. Common Name. 



OUs Eastlndies •• Plaited Lamp • • 



Division II. — Shell depressed, and whorl coiled horizontally. 



Family I. — Umbilicated. 



Cornea Stagnant waters in Europe Horn Snail • . • 



Similis Dcinnark, Berlin Dotted .-.do-. 



Spirorbis Britain, France Small concave do 



Pol\ grata Many-wliorl'd do 



Contorta Europe Coiled •••do-- 



Alba England, Denmark "White -••• do •• 



Crystallina Ditto, ditto Crystal ••• do •• 



Cornu arietis ••• Aniboyna Rams horn do-- 



Cornu-venatorium Hunter's liorn do 



Family 2. — Imperforate and keeled. 



Planorbis Europe Notch-lipp'd do ^ . 



Complanata • • • • Ditto Flat-umbilicated 



Vortex Ditto Vortex do • ■ 



Division 111.— Shell with the aperture sub-lunate. 



Family 1. — Umbilicated and depressed. 

 Ericetorum England, France, Italy • • Heath • ■ • • do 



