156 VITRINA. 



Y. HERBINI, Bourg. PI. 34, figs. 80-82. 



Imperforate, semiglobose, very thin, diaphanous, chestnut 

 fawn-color, shining, smooth or very finely striated if viewed with 

 a lens ; whorls 3, rapidly enlarging, the last submarginate ; colu- 

 mellar lip reflected above, forming an umbilical callus. 



Diam. 10, alt. 7 mill. 



Mis. of Abyssinia. 



Y. NATALENSIS, Krauss. PL 34, figs. 83-84. 



Depressed globose, thin, smooth, pellucid, olivaceous-corneous, 

 with a single chestnut line above the periphery ; whorls 4| 5, the 

 last excavated around the imperforate axis ; columella callous 

 above, outer lip subinflected. Diam. 19, alt. 12 mill. 



Natal, So. Africa. 



Y. POPPIGI, Menke. PL 34, figs. 85-87. 



Subglobose, imperforate, very thin, striulate, shining, pellucid, 

 yellowish horn-color, with a chestnut line above the periphery; 

 whorls 4, suture submargined. Diam. 10*5, alt. 7 mill. 



Natal, So. Africa. 



Smaller and more globose than the preceding species. 



Y. TRANSVAALENSIS, Craven. PL 34, fio;s. 88, 89. 



7 7 O 7 



Globular, imperforate, l^aline, semitransparent, fragile, glossy, 

 amber-colored ; whorls 3^-4, ver} r convex, rapidly increasing, last 

 whorl faintly striated, and slightly puckered at the linear suture. 



Diam. 10'5, alt. 8*5 mill. 



Leyderiburg, Transvaal. 



More globular, and without the colored band of the last 

 species. 



Y. YANDENBROECKII, Craven. PL 34, figs. 90, 91. 



Oblong, vitreous, depressed, somewhat flattened and dull 

 above, more convex and glossy below, pale yellow, apex, suture 

 and margin of aperture dark amber; whorls 3^, rapidly enlarging, 

 the last ver} 7 large, with deep, puckered suture. 



Diam. 14*5, alt. 10 mill. 



Leydenburg, Transvaal. 



Except in the want of chestnut-margined suture this is very 

 like F. pellicula, Fer. 



