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DIVISION I. Spire not quite concealed. 



Scientific name. 



Exanthema, 



Mappa, 



Arabica, 



Histrio, 



Argus, 



Testudinaria, 



Stercoraria, 



Aurora, 



Carmeola, 



Locality. 

 Am. Ocean, W. Indies. 

 Africa, Amboyna. 

 Madagascar, do. 

 So. Seas, Ind. Ocean. 

 Amboyna, Guinea, W. I. 

 Persian Gulf, Amboyna. 

 Coast of Guinea. 

 So. Seis. 

 Amboyna, East Indies. 



Scientific name. 

 Talpa, 

 Lurida, 

 Vanella, 

 Lota, 

 Guttala, 

 Sanguinolenta, 

 Undata, 

 Teres, 

 Aperta, 



Locality. 



Asia, Madagascar. 

 Med., Senegal, Brazils. 

 Barbadoes, Jamaica. 

 Sicilian Seas. 



Mauritius. 



DIVISION II. Obtuse spire quite concealed. 



Achatina, So. Seas, New Holland. 



Caput serpentis, do. do. Mauritius, E. Ind. 



Mauritiana, Persian Gulf, do. 



Vitellus, Amboyna, South Seas. 



Mus, Mediterranean, Africa. 



Tigris, Red Sea, South Seas, 



Amboyna. 



Pantherina, Red Sea. 



DIVISION III. Umbilicated. 



DIVISION IV. With the margin thickened. 



