SYSTEMATIC INDEX. 



I. SUB-CLASS GASTROPODA. 



Order PULMONATA. 

 I. Sub-Order GEOPHILA. 

 Fam. Helicidae . 



Group AGNATHA. 

 Sub-Fam. Onchidiidae . 

 Genus Onchidium 

 Sub-Fam. Testacellid 

 Genus Testacella . , 



Streptaxis 



,, Ennea . . 

 Sub-Genus Faula 



Huttonella 



Genus Edentulina 



,, Streptostele . 

 Sub-Genus Elma 

 Genus Ooeliaxis . 



Gibbus . 

 Sub-Genus Goniodomus . 



,, Gonospira 



Genus Streptostyla . 



,, Glandina . 



,, Oleacina . 



Group OXYGNATHA. 



Sub-Fam. Limacea 

 Genus Limax 

 Pannacella 

 ,, Tennentia 

 ,, Parmarion 

 Sub-Fam. Vitrinea . 

 Genus Helicarion 

 Sub-Genus Austenia . 

 Genus Vitrinopsis 

 Vitrina . 

 ,, Nanina 



Sub-Genus Ariophanta 

 Macrochlamys 



Sitala . 



,, Microcystis 



Rotula 



