2 7 
Auricula Hordeola Lam. 
Ast. 
— Gracilis Brocc. (Turbo) 
Pedem. 
Sect. CYCLOSTOMATA E. Sism. 
Genus Cyclostoma Lam. 
Cyclostoma Decussatum Bon. 
Dert. 
— Subcarinatum Mich. 
( Melania Bon. ) 
Ast. Dert. 
Genus Helicina Lam. 
Helicina Dubia Lam. 
(Rotella Defrancii Bast. ) 
Taur. 
Sect. NERITACEA Lam. 
Genus Nerita Linn. 
Nerita Polita Linn. Lam. 
( N. Proteus Bon. ) 
Taur. (v. in Oc. Ind.) 
— Plutonis Bast. 
Taur. 
— Zig-Zag Lam. (Neritina) 
Ast. ( v. in Antill. ? ) 
— Gigantea Bell. Mich. 
Taur. 
— Hisingeri Bell. Mich. 
Taur. 
— Morellii Bell. Mich. 
Taur. 
Sect. MACROSTOMATA Lam. 
Genus Natica Adans. 
Natica Monilifera Lam. 
( N. Glaucina Linn. ) 
Taur. Ast. (v. in mar. Eur.) 
— Mamilla Linn. Lam. 
Taur. (v. in Oc.Ind.) 
— Canrena Lam. 
Taur. (v. in Oc. Ind.) 
— Millepunctata Lam. 
(N. Canrena Br. Var.) 
Ast. (v. in Oc. Ind.) 
— Marochiensis Lam. 
Ast.(v. in litor.Maroch. et Antil.) 
— OUa Marc. De Serr. 
( N. Glaucina Br. ) 
Taur. (v. in Medit.) 
— Epiglottina Lam. 
Ast. 
— Glauca Humb. 
( N. Patula Lam. ) 
Taur. (v. in Oc. Amer.) 
— Umbilicosa Bon. 
Ast. 
— Helicina Brocc. (Nerita) 
Ast. 
— Fasciolata Bon. 
Pedem. 
— Tectula Bon. 
Pedem. 
— Scalaris Bell. Mich. 
Taur. 
— Compressa Bast. 
( Ampullaria ) 
Taur. 
— Villelmetii Desh. 
( Ampullaria ) 
Taur. 
