SUB- GENUS. CYRTULUS. Hinds, 1843. 

 1 C. serotinus. Hinds. Marquesas. 



FAMILY 2. PLEUROTOMIME. //. and A. Adams. 

 SUB-FAMILY 1. PLEUROTOMINiE. Swainson, 1840. 

 GENUS. PLEUROTOMA. Lamarck, 1799. 

 Tranquebar. 



1 P. crenularis. 



2 P. grandis. 



3 P. Javana. 



Lamarck. 



Gray. 



DeRoissy. 



Lamarck. 



Indian & Chinese Seas. 



a Madras.* 



b Vizagapatam. 



Malacca. 



Madras.* 



Mouth of the Gambia. 



4 "P. marmorata. 



5 P. nodifera. 



6 P. virginea. Beck. 



FAMILY 3. TRITONIID^E. H. and A. Adams. 



GENUS. TRITON. Lamarck, 1822. 



1 T. asgrotus. Reeve. China. 



2 T. aquatilis. Philippines. 



3 T. bracteatus. Hinds. Kingsmill Island, M. Robillard. 



4 T. chlorostoma. Lamarck. Pacific Ocean. 



