Molluscan Fauna of St. Helena. 135 



17. Rissoina MelUssiy Smith. 

 A few worn examples. 



18. Rissoina Turtoni^ Smith. 

 Numerous specimens. 



19. Rissoa ephamilla, Smith. 

 Several specimens, none with perfect outer lip. 



20. Rissoa glyptOj Smith. 



21. Rissoa eritima^ Smith. 



22. Rissoa compsa. Smith. 

 Numerous specimens, having a very solid look. 



23. Rissoa Wallichij Smith. 



24. Rissoa perfectaj Smith. 



25. Rissoa varici/era, Smith. 



26. Hipponyx Grayanus^ Menkc. 



One small specimen, 3 millim. in length. 



27. Turbo {Leptothyra) rubricinctuSj Mighels. 

 Many specimens. 



28. Liotia arenula, Smith. 

 29. Gadinia costata (Krauss) ? 

 One very small specimen, only 4 millim. in length. 



30. Williamia Gussoni (Costa). 

 A single specimen, 3 millim. long. 



31. Ervilia subcancellata, Smith. 

 32. Area {Acar) doming ensisj Lamarck. 



Minute specimens only. 



33. Area sanctce-helence, Smith. 

 Only very small examples, not more than 3 millim. long. 



EXPLANATION OF PLATE XH. (part). 



Fig. 1. Tellimya simillima. 

 Fig. 2. Tellimya producta. 

 Fig. 7. Jeffreysia atlantica. 



