170 
UNIVALVES — HELIX. 
Diviston XI.—Sheil ventricose, peliucid, and aperture ovate. 
Scientific Name. 
Stagnalis 
Fragilis --++++ +++ 
Palustris «+ ++++++ 
Fossaria 
Albicans:+-- «+ 
Putris 
Peregra erteseceee 
Limosa 
Truncatula ------ 
Inflata aintavahevatetete ie 
Opaca eeevoeerese 
Glutinosa-----«- 
Levigata «+--+ 
Balthica ---+-++. 
Neritoidea ------ 
Repanda ercisuateievers 
Canalisissse ccc 
Auricularia 
eeeee 
Consolidata ---:- 
Decollata eesee 
Truncata.--++--> 
Famity 1.—Imperforate. 
Locality. Common Name. 
ESritain = selec = cisisuioale Lake Snail ---- 
Denmark ----+-++-+es0; Brittle ---- do-- 
Britainmice ciehete otslecerepemmey en Marsh ---- do-- 
Titaiiimretstoctetetsieterleretsivers Ditch --:- do -- 
Hamburg sien tle Moo ale tesiolanete White ---- do «- 
Britain --+2-+-.seeeeee Thin yellowish do 
Fredericksburg, Seine -- Horny «+++ do «+ 
Europe AACA AE obo bat ac Rough ASS G (yuu, 
Saxony s+eereees beeeees Truncated » do -- 
IDittorerisene aie Sia wliete aie iatahets Inflated --- do -- 
Hamburg etatelaWotereelevetichevers Opaque sree Gonna 
Europe avole leita atelpietorala (elses Dusky Sooo (nos 
Devonshire --<«++++++--> Yellow ---- do-: 
Sicily OM ae AO RE BOS Sicilian «+++: do -- 
Britain --.+. cee eereese + Membranous do 
Ditto ++ +e eee e cere ee eeee Smooth flesh color 
Baltic ----- siolahelsteversisneiere Baltics. 1. do. 
es ccccece etal icislelowe(eha\alereicie Nerite-shaped do- 
Famity 2.—Umbilicated. 
Thangelstadt -+++--++++- Ventricose - do >: 
Britain «+ ++++eeeeee wees Channelled do -+ 
Britain e¢+scscrcecccees Eared ---- do=- 
Division XI].—TZurreted. 
FamiLy 1,—Apez truncated, 
Surinam +++seeseeese eee Flat tipp’d do -- 
South of Europe -+-+--- Truncated + do -- 
St. Domingo eplsieleeine cicis Flag ve ocles Sh ise 
