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DIVISION I. Shell umbilicated. 



Family 1st. Umbilicus rather large, nearly pervious. 



Scientific name. Locality. Scientific name. 



Vitellus, • Maurit., Amboyna, Asia. Rugosa, 



Punctata, Mediterranean. Vittata, 



Cruentata, Tranquebar. Pallidula, 



Family *2d. Umbilicus bifid. 



Canrena, 



Cancellata, 

 Sulcata, 



All parts of the world. 

 West Indies. 



Spadicea, 

 Rufa, 



Locality. 

 West Indies. 

 Morocco. 

 Euo-land. 



Mauritius. 



East aud West Indies. 



Family 3d. Umbilicus nearly closed by a callous, or by the inner lip. 



Glaucina, 

 Oriental is, 



Maroceana, 



Arachnoides, 



Albumen, 



Fulminea, 



Corona, 



Radula, 

 Magdalena, 



Cornea, 

 Fluveatilis, 



Pulligera, 



Aculeata, 



Pupa, 



Bidens, 



Flavescens, 



Virides, 



Virginia, 



Eu., Af., Amer., E. Ind. 

 E. Ind., Bay of Naples. 

 Africa, W. Ind., do. 



Mammilla, 



Papilla, 



Melanostemn, 



Ambigua, 



do., Maurit., Tranque. 

 New Zealand, do. 

 Mauritius, W. Indies. 

 Mediterranean. 



Amb., C. G. H., Moluc. 



Family 4th. Umbilicus toothed. 

 Senegal, Moluccas. 



DIVISION II. Shell imperforate and toothless. 



Family 1st. Spinous. 

 Ganges, China. 



Family 2cJ. Without spines. 



Amboyna, Tranquebar. Littoral is, 



Magdalen Isles. Lacustris, 



Red Sea. Dubia, 



Europe. Marginata, 



Europe, 

 do. 



DIVISION III. Shell imperforate and toothed. 

 Family 1st. Liner lip toothed. 



India, Amb., So. Seas. 

 East Indies. 

 Jamaica. 

 New Zealand. 

 Nicobar Isles. 

 West Indies. 

 ^yfe. Medit. 



Turrita, 



Piperina, 



Larva, 



Ascensiones, 



Malaccensis, 



Hieroglyphica, 



West Indies. 



Malabar. 



Amboyna. 



Island of Ascension. 



Malaccas. 



East Indies. 



