HELIX. 103 



carinated, base scarcely convex, impressed in the middle. 



Real Llejos, Central America. 



Section PELL A, Albers, 1860. 



H. TROTTERIANA, Benson. PL 20, fig. 57. 



Imperforate, very thin, translucent, obsoletely plicatulate, 

 greenish corneous, apex smooth, reddish ; whorls 4, slightly convex, 

 the last not descending; columellar margin filiform, subvertical, 

 slightly arcuate, entering, white. Diam. 19'5 mill. 



Uitenhage, So. Africa. 



H. NATALENSIS, Pfr. PI. 20, fig. 58. 



Imperforate, thin, smooth, subdiaphanous, corneous whitish, with 

 irregular brownish radiating lines ; whorls 4, scarcely convex, the 

 last inflated ; columella subvertical, filiform, profoundly entering, 

 interior fulvous, shining. Diam. 12 mill. 



Natal, So. Africa. 



H. COTYLEDONIS, Benson. PI. 20, fig. 59. 



Imperforate, thin, rather smooth, diaphanous, brownish corneous, 

 opaquely widely white-zoned ; whorls 5, scarcely convex, the last 

 not descending, convex below, rudely radiately subplicate, with two 

 narrow bands ; columella tubercu lately callous above. 



Simon's Bay, Cape of Good Hope. 



H. PINGUIS, Krauss. PI. 20, fig. 60. 



Perforate, thin, pellucid, smooth, shining, brownish corneous 

 above, paler beneath ; whorls 5?, convex, slowly increasing, base 

 subplanulate, impressed in the middle. Diam. 8 mill. 



Natal, So. Africa. 



H. CAPENSIS, Pfr. PI. 20, fig. 61. 



Perforate, thin, opaque, a little shining, white, dotted with 

 blackish, obsoletely brown rayed ; whorls 4i, scarcely convex ; 

 interior fulvous. Diam. 9 mill. 



Cape of Good Hope. 



H. irrorata, Ziegl. MSS., and H. littoricola, Benson, MSS., are 

 synonyms. 



H. AUSTRALIA Menke. PL 20, fig. 62. 



Narrowly umbilicated, smooth, obsoletely striated, whitish with 

 obsolete ashy radiating maculations and interrupted bands ; whorls 

 5, rapidly increasing. Diam. 4 mill. 



f Swan River, Australia. 



