SYSTEMATIC INDEX XVli 



PAGE 



Fam. : ARIONID^E (continued) 



(Sub-gen. : Prolepis, Moquin-Tandon, 1855) 



2. A. subfuscus (Draparnaud) . . 160 



3. A. hortensis, Ferussac 161 



(Sub-gen. : Carinella, Mabille, 187U) 



4. A. circumscriptus, Johnston . . . 163 

 (Sub-gen. : Ariunculus, Lessona, 1881) 



5. A. intennedius, Normand . . . . 164 

 Genus : 2. Geomalacus, Allman, 1843 



1. G. maculosus, Allraan 165 



Fam.: M ACR CHL AM YD ID iE ... 166 



Genus : 1. Petasina, Beck, 1847 .... 166 



1. P. fulva (Miiller) 167 



Fam.: ZONITIDiE 169 



(Sub-fam. : ARIOPHANTIN^) 169 



Genus : 1. Zonitoides, Lehmann, 1862 . . 169 



1. Z. nitidus (Miiller) 170 



2. Z. excavatus (Bean MS., Alder) . . 172 

 (Sub-fam.: ZONITIN^E) 172 



Genus : 2. Helicella, Ferussac, 1821 . . 173 

 (Sub-gen. : Helicella, s.s.) 



1. H. draparnaldi, Beck 173 



2. H. cellaria (Muller) 175 



3. H. rogersi (B. B. Woodward) . . 176 



4. H. alliaria (Miller) 177 



(Sub-gen. : Retinella, (Shuttleworth Ms.) 

 Fischer, 1877) 



5. H, nitidula (Draparnaud) . . . . 178 



6. H. pura (Alder) 180 



7. H. radiatula (Alder) 181 



Genus : 3. Vitrea, Fitzingcr, 1833 ... 183 



1. V. crystallina (Miiller) 183 



N.-M. MOLL. 6 



