of British Mollusca. 
greatly multiplied so-called species in this genus, r< 
nitens as distinct from H. nitidula , and Helmii as 
of it. 
Fam. 3. Helicidae. 
Genus 1. Aeion, Ferussac. 
198. Avion ater (Linn.). 
Var .flavus (Muller). 
199, Avion hortensis (Ferussac). 
Genus 2. Geomalacus, Allman. 
200. Geomalacus maculosus , Allman. 
Genus 3. Helix, Linnd. 
Subgenus 1. Punctum, Morse. 
201. Helix pygmcea , Drap. 
Subgenus 2. Patula, Held. 
202. Helix rotundata , Muller. 
203. Helix rupestris , Studer. 
Subgenus 3. Vallonia, Kisso. 
204. Helix pulchella, Muller. 
Var. costata ) Muller. 
Subgenus 4. Acajmthinula, Beck. 
205. Helix aeuleata , Muller. 
206. Helix lamellata ) Jeffreys. 
Subgenus 5. Gonostoma, Held. 
207. Helix obvoluta, Muller. 
Subgenus 6 . Chilotrema, Leacli. 
208. Helix lapicida , Linn. 
Subgenus 7. Fruticola, Held. 
209. Helix hispida , Linn. 
Var. 1. concinna , Jeffreys. 
Var. 2. depilata, Pfr. 
331 
3gard II. 
a variety 
