of British Mollusca. 331 



greatly multiplied so-called species in this genus, regard H. 

 nitens as distinct from //. nitidula^ and Uelniii as a variety 

 of it. 



Fam. 3. HelicidsB. 



Genus 1. Arion, Ferussac. 



198. Arion ater (Linn.). 



Yai'.Jlavus (Miiller). 



199. Arion hortensis (Fdrussac). 



Genus 2. Geomalacus, Allman. 



200. Geomalacus maculosusj Allman. 



Genus 3. Helix, Linnd. 



Subgenus 1. Punctum, Morse. 



201. Helix pi/gmwa, Drap. 



Subgenus 2. Patula, Held. 



202. Helix rotundataj Miiller. 



203. Helix rupestrisj Studer. 



Subgenus 3. Vallonia, Risso. 



204. Helix pulchella, Miiller. 



Var. costafttj Miiller. 



Subgenus 4. Acanthinula, Beck. 



205. Helix aculeata^ Miiller. 



206. Helix lamellata, Jeffreys. 



Subgenus 5. Gonostoma, Held. 



207. Helix obvoluta, Miiller. 



Subgenus 6. Chilotkema, Leaob. 



208. Helix lapicida, Linn. 



Subgenus 7. Fkuticola, Held. 



209. Helix hispida, Linn. 



Var. 1. concinna, Jeffreys. 

 Var. 2. depilata, Pfr. 



