DAUDEBARDTA. 13 



D. LETOURNEUXI, Bourg. PI. 2, figs. 82-84. 



Shell very minute, much elevated, umbilicated, vitriniform, 

 shining, hyaline ; above narrowly radiately striulate, below 

 smooth ; whorls 2|, rapidly increasing, with well-impressed 

 sutures, the last large, oblique, convex below. 



L. 2-25, alt. 1-25 mill. 



Bona, Algiers. 



Immediately recognized by its small size and Yitrina-like 

 aspect. 



D. NUBIGENA, Bourg. PL 2, figs. 85-87. 



Shell umbilicated, much depressed, whorls 3, slightly convex, 

 with strongly impressed sutures, undulatingty striate above ; aper- 

 ture narrowly oval, the margins joined by a thin callus. 



Length, 5 mill. 



Algiers. 

 D. NIVALIS, Benoit. PL 2, figs. 71, 72. 



Shell umbilicated, subclepressed, vitreous, hyaline, diaphanous, 

 very fragile, substriate near the suture ; greenish horn-color ; 

 aperture ovately lunate, oblique. Diam. maj., 4 mill. 



Sicily. 



Resembles a Hyalinia in appearance. 



D. GRANDIS, Benoit. PL 26, fig. 2. 



Shell with deep umbilicus, convex, nearly smooth, shining, 

 broadly oval, nearly rounded, whorls 3, suture well-marked, 

 aperture large, rounded-oval, peristome subcontinuous. 



Length, 8 mill. 



Palermo. 



Has not the auriculate form of D. brevipes, and the aperture is 

 broader and spire more convex than D. rufa. 



D. MONTICOLA, Benoit. PL 26, fig. 1. 



Shell minute, umbilicated, shining, transparent, aperture 

 rounded-ovate. L. 3 mill., diam. 1*5 mill. 



Mt. St. Martino, near Monreale, Sicily. 



Differs from the preceding species by its smaller size, less 

 dilated aperture, more elongated form. 



D. HALICIENSIS, Westerlund. 



Shell umbilicated, umbilicus spirally dilated to the aperture, 

 oblong-ovate, diaphanous, greenish hyaline, thinly distantly 



