Trochus- 



157 



2843 1 sp, Bengalis. 



2844 2 asper Ch. Guinea? 



T. asper (agrestis) Ch. V. 



1852 Gm. 

 T. perlatus Gm. 

 T. cingulalus Link. 

 T. quadricarinatus Ch. XI. 

 M. tricarinata Lam. 

 Cidaris granulata Bolt. 



2845 2 sp. Ind. or. 



