XVI INTKODUCTIO. 



donla, IhdivUjona, Ilelicella ot Ifelicostyla geniis a ine atioplaluin 

 elfornianl. 



In genere depurato Laniarckiano (1822.) Helicella antea 

 (1812.) al) auclore separata iteruni injungitur et bene segregatur 

 Afiostonia, male autem duce Schumacher CarocoUa. 



Alii auctores vario niodo hoc genus in multa genera vel 



subgenera diviserunt, ex quibus huc referenda mihi videntur: 



Pleurodonta Fischer 1807 — Caprimis, Caracolm , Cepoluni. Poly- 



dontes, Iberus, Acavus , Zonites Montf. 1810 — Carocolla, Dentel- 



laria, Otala Schumacher 1817 — Pohjgyra Say 1817 — Mesom- 



phix, Odotropis et Chimotrema Rafinesque 1819 — Arianta, 



Chilotrema, Pomatia, Tachea, Teba, Zurama Leach 1820 — Heli- 



cogena, Cantareus, Ilelicodonta, Helicigona, Hygromia^ IleUceUa, 



Theba et Vallonia (?) Risso 1826 — Solarium Spix 1827 — Slc- 



nopus Guiid. 1828 — Ariophanta Desmoulins 1829 — Aplodon. 



Stenostoma, Toxostoma, Mesodon, Omphalina, Triodopsis, Xolo- 



trema, Odomphium Raimesqyie 1831 — CaracoUa Broderip 1832 



— Conulus , Pyramidula, Monacha, HeUceUa, Latomus, Isognomo- 



stoma , Trigonostoma , Chilostoma, Gonyodiscus , Disciis, Vitrea, 



Aegopis, Oxychilus, Helicopsis Fitzinger 1833 — Nanina Gra\ 



1834 — Drepanostoma Porro 1836 — Acave Krynicki 1836 — 



Cepaea, Coenatoria, Cingulifera, Corneola, Lenticula , Xerophila. 



Fruticicola, Trochiscus , Gonosloma, Tragomnm, Patuhi, PoUta 



Held 1837 — HeUcopsis, Microcystis, Nanina, Ariophanta, Steno- 



pus, HeliceUa, Mesomphix, Zonites , Eyryomphcda, Sagda, Pitys, 



Turricuki, Theba, Leucochroa , Ochthephila, Bradybaena , Petasia, 



Daedalochila , Tridopsis, Polygyra, Circinaria, Macrocyclis , Cam- 



pylaea, Solaropsis, Iberus, Chilotrema, CaracolUna , Vortex, Chlo- 



ritis, Planispira, Obba, AmpeUta, CaracoUa, Polydontes, Labyrin- 



thus, Pleurodonta, DenteUaria, OLala, Helicostyla , AcavuSj Heli- 



cogena , Arianta, Galaxias, Pomatia, Polymita, Eurycratera, 



Stylodon, Helicophanta , Geotrochus et Orthostijlus (pars) Beck 



1 837 — HeUx, Cryptomphalus, Chilosloma, Trigonostoma, CarocoUa, 



Conulus, Helicelki, Dekmphalus et Hyalinia Agassiz el Gharpentier 



1837 — Odontostylus Gray 1840? — Obelus, Oxynota, Eiipa- 



rypha, HeUcella, Zonites, Lomastoma, Chilostoma, Actinota, De- 



lomphalus , Aegopis, Oxylopha, Trigonostoma , Drepanostoma, 



Isognomostoma , Conuhis, PUcaria, Calocochlea, Proleusia, Tachea, 



Helicogena, Arianta, Monacha, Trichia, Teba, HyaUnia, Chromo- 



cochleu, Columplica, Eidota, Gallina, Heterostoma Ilartm. 1840 — 



44 — ■ Leiostoma, Lucerria, CaracoUa, Discodoma, Lucidula, Lu- 



cerneUa, Polydontes , Lyrostoma, Polygyra, Lucidella, Pusiodon, 



Thelidomus, HeUx, Hemicycla, Zonites, Epistyla, Hemitrochus, 



Geotrochus, Geomitra, HeUceUa Svvains. 1840. (De omnibus hisce 



nominibus conf. Agass. Nomencl. et Herrmannsen ind. , nec 



non ind. alphabeticus generum et subgenerum in fine vol. II. i 



