Proc.Acad.Nat.SciPhtlci.1888. 



PL XVII 



in 



U 



A 



22 % 9 



V ^- 





■> 



JL 



Z^- 



B 

 ■■J 



A 



/'^ 



' ' ^ ! 





Ey.sbTy, del. 



PilslDry,Iielicoid Li andMoTlusks of S ermuda. 



