NANINA. 12? 



ST. THOMENSIS, Dohrn. PL 42, figs. 2, 3. 



Narrowly umbilicated, thin, pellucid, striatulate; reddish or 

 r ellowish corneous; whorls 4-5, suture margined, usually white 

 hreaded, periphery subangulated. Diam. 12, alt. 9*5 mill. 



Ins. St. Thomas, W. Africa. 



ST. CHRYSOSTICTA, Morelet. PL 42, figs. 94-96. 



Perforate, thin, smooth, radiately striated at the suture, shin- 

 ng, pellucid ; fulvous or yellowish corneous, with irregular 

 traw-colored opaque dots and maculations ; spire more or less 

 lepressed ; whorls 5-5J, periphery obtusely angulated. 



Diam. 13, alt. 6 mill. 



Ins. St. Thomas, W. Africa. 



. AGLYPTA, Dohrn. PL 42, figs. 4, 5. 



Perforation nearly covered, striulate, slightly shining, dia- 

 phanous; reddish corneous ; whorls 7, periphery carinated. 



Diam. 10, alt. 10 mill. 



Prince's Isl., Guinea. 

 S". CALAMECHROA, Jonas. PL 42, figs. 8, 9. 



Perforate, thin, shining, pellucid, regularly striate and very 

 ightly spiralty lined, forming a decussation scarcely apparent 

 ;o the naked eye ; straw-colored ; whorls 5^. 



Diam. 17, alt. 8 mill. 



Guinea. 



It is N. tenera, Jonas, in litt. 



N". EGENULA, Morelet. PL 42, figs. 91-93. 



Perforate, thin, somewhat solid, rather smooth, shining, pel- 

 ucid, corneous; whorls 4^. Diam. 7, alt. scarcely 4 mill. 



Senegal. 

 N". COLUMELLARIS, Pfr. PL 42, figs. 6, 7. 



Scarcely perforate, thin, pellucid, smooth; amber-colored; 

 whorls 4J, suture margined ; columella bearing a tooth-like 

 hickening of callus. Diam. 7, alt. 4 mill. 



Senegal. 

 N. OLEOSA, Pfr. PL 42, figs. 100, 1. 



Subperforate, thin, smooth, oleaceous-shining ; brownish cor- 

 leous ; whorls 4^. Diam. 5'6, alt. 3 mill. 



Ibu, W. Africa. 



