154 VITRINA. 



aperture subdiagonal, Innately oval, lip slightly inflected, the 

 columellar margin narrowly membranaceous. 



Diam. 16, alt. 7'5 mill. 



bennaar, Nubia. 



Is this a not completely grown F. hians ? 

 Y. HIANS, Riippell. PL 33, figs. 45-47 ; PI. 34, figs. 50-52. 



Depressed globose, thin, striulate, pellucid, somewhat shining, 

 light corneous, with radiating darker streaks, suture impressed, 

 margined ; whorls 4, rapidly increasing, the last rounded. 



Diam. 24, alt. 12 mill. 



Abyssinia. 



V. Ruppelliana, Pfr. (figs. 45-47), appears to be a younger 

 state of this species ; F. Darnaudi (above) is probably a still 

 younger form. 



Y. JICKELII, Krauss. PI. 33, figs. 48, 49. 



Subglobose, thin, shining, striate, yellowish brown; spire 

 slightly convex, the apex planulate, suture slightly narrowly 

 margined ; whorls less than 3, rapidly increasing, the last 

 globose, slightly descending in front ; peristome narrowly mem- 

 braneous. Diam. 11*75, alt. 8 mill. 



Abyssinia. 



Perhaps the young of the next species. 



Y. ISSELI, Morelet. PI. 34, figs. 56-58. 



Globosely depressed, thin, pellucid, irregularly striulate, yel- 

 lowish green, suture narrowly margined ; whorls 3i, rapidly 

 enlarging, the last large, depressly rounded, more convex below; 

 columellar margin almost membraneous. Diam. 15, alt. 8 mill. 



Abyssinia. 

 Y. SEMIRUGATA, Jickeli. PI. 34, figs. 53-55. 



Depressed globose, thin, diaphanous", somewhat shining, rugose, 

 yellowish-brown ; spire small, with minute, submamillarjr apex, 

 suture slightly thread-margined ; whorls 4, rapidly enlarging, 

 the last rounded, slightly descending in front ; lip membraneous 

 below, reflected at the columellar insertion, forming a slit. 



Diam. 15'75, alt. 9'5 mill. 



Y. CAILLIAUDI, Morelet. PI. 34, figs. 59-67. 



Depressed, thin, thinly and lightly striated, shining, pellucid, 

 orange-brown ; spire planulate, the impressed suture narrowly 



