170 UNIVALVES HELIX, 



Division XI. — Shell ventricose, pellucid, and aperture ovate. 



* Family 1, — Imperforate, 



Scientific Name. Locality. Common Name^ 



Stagnalis Britain Lake Snail • • 



Fragilis Denmark Brittle • • • • do 



Palustris Britain Marsh do 



Fossaria Britain Ditch ••••do 



Albicans Hamburg White do 



Putris Britain Thin yellovvisli do 



Peregra Fredericksburg, Seine • • Horny • • • • do 



Limosa Europe Rough • • • • do 



Truncatula Saxony Truncated • do 



Inflata Ditto Inflated • • • do 



Opaca Hamburg Opaque • • • do 



Tentaculata Europe Dusky • • • • do 



Lutea Devonshire Yellow • • • • do 



Sicula Sicily Sicilian • • • • do 



Glutinosa Britain •• Membranous do 



Leevigata Ditto Smooth flesh color 



Balthica Baltic Baltic do • • 



Neritoidea Nerite-shaped do^ 



Family 2. — Umhilicated. 



Repanda Thangelstadt Ventricose • do • • 



Canalis Britain Channelled do • • 



Auricularia Britain Eared • • • • do • • 



Division XII. — Turreted. 



Family 1. — Apex truncated. 



CoDsolidata Surinam Flat tipp'd do 



DecoUata South of Europe Truncated • do 



TruDcata •• St, Domingo • • • • Flag do 



