216 PROCKEDINGS OF THE MALACOLOGICAL SOCIETY. 



5. Plesiotrochds oosimensis, Watson. 



Bittium oosimense, Challenger Eep., Zool., vol, xv, p. 548, 

 pi. xxxix, fig. 1, 1886. 



6. Plesiotrochus eischeri, Smith, Proc. Malac. Soc, vol. viii, 



p. 370, fig., 1909. 



7. Plesiotrochijs unicinctus (A. Adams). 



Ztztphinus unicinctus, A. Ad., Proc. Zool. Soc, 1851 (1853), 



p. 167. 

 Plesiotrochus unicinctus, Hedley, Proc. Linn. Soc. N.S.W., 



vol. xxxviii, p. 291, pi. xvii, fig. 63, 1913. 



8. Plesiotrochus cetlonicus, Sowerby (herein described). 



Add to these two unnamed species mentioned by Nevill (Hand 

 List Moll. Ind. Mas., 1884, p. 158) from Mauritius and the 

 Amiamans, and probably Bittium sca/afum, Dunker, from Japan 

 (Index Moll. Maris Japon., 1882, p. 1U8). 



