154 Proceedings of the Royal Society of Victoria. 



1887. Potamides (Cerithidea) turritella, Tryon (non Quoy 

 and Gaimard). Man. Conch., vol. ix., p. 163, 

 pi. 34, f. 93, 94. 

 1897. Batillaria cerithium, Tate. T.R.S. S.A., p. 42. 

 Hab. — The same as the preceding species. 

 Obs. — We have reasons for believing that the shell of the male 

 is very much smaller than that of the female, and investigations 

 of the molluscs may result in a reduction of the number of 

 specific names. 



BiTTIUM LAWLEYANUM, CrOSSe. 



1863. Bittium lawleyanum, Crosse. Jour, de Conch., 



p. 87, pi. 1, f. 4. 

 1887. Bittium lawleyanum, Tryon. Man. Conch., vol. ix., 

 p. 1.54, pi. 30, f. 5. 

 Hab. — Same as preceding. 



Bittium insculptum, Sowerby. 



1865. Cerithium insculptuni, Sowerby. In Reeve's Conch. 



Icon., vol. XV., pi. 18, f. 128. 



1866. Cerithium insculptum, Sowerby. Thes. Conch., 



vol. iii., pi. 290, f. 332. 

 Hab. — Same as preceding. 



Obs. — Tryon unites this with B. lawleyanum, but we are unable 

 to agree with him. 



Bittium estuarinum, Tate. 



Bittium pyramidale, Tate, m.s. 

 1878. Bittium estuarinum, Tate. T.R.S. S.A., p. 190, 

 pi. 1, f. 12. 

 Hab. — Same as preceding. 



Obs. — We think an extended series of specimens may result, 

 in uniting this with B. insculptum. 



Bittium icarus, Bayle. 



1855. Cerithium tenue, Sowerby (non. Deshayes). Thes. 



Conch., vol. ii., p. 876, pi. 184, f. 212 (on the 



plate in error numbered 202). 

 1865. Cerithium tenue. Reeve. Conch. Icon., vol. xv., 



pi. 18, f. 130. 



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