8 



15. R. h^vigata, Lam. 



16. R. ventricosa, Brod. Z. P. 1832. CalLio. Peru. 



17. R. elegans, B(?cA. Cheinn. 1270. Nicobar. 



18. R. sub granosa, Sow. Jun. Z. P. 1841. Bay of Man- 



illa. This shell differs from R. elegans in being 

 more finely grained and in the tubercles being 

 much less sharp and prominent. \<7ii'\ 

 > ,y'^>-^^'',^ 19. R. pulchra, Gray. Jay's catalogue, comonly called 



X>>^^-^"^"" the " Finned Frog." 



20. R. verrucosa, Sow. Jun. from a shell in the collec- 



tion of J. Norris, Esq. resembling, in general 

 form, R. Rhodostona and R. cruentata, but 

 having on each side of the whorl, 3 rows, each 

 consisting of three large, mahogany brown, 

 smooth, rounded tubercles, between the varices, 

 and of one on the varix. The teeth on the inner 

 lip are interlined with red. 



21. R. scrobiculator, var. 



22. R. neglecta, Soiv. Jun. Z. P. 1841. 





