14 DAUDEBARDIA. 



striate ; whorls more than 3, the last one greatty increasing, 

 dilated in front ; suture margined ; spire almost half the diameter 

 of the shell ; aperture obovate, outer lip slightly arcuate, not 

 extending beyond the shell, inner lip slightly curved behind. 



L. 4, lat. 3, alt. 1-3 mill. 



Galicia. 



An un figured species. Differs from D. nivalis in its wider 

 umbilicus, striae, more ovate aperture, scarcely exceeding half 

 the length of the shell, more converging margins, etc. 



D. ISSELTANA, Nevill. PI. 2, figs. 54, 55. 



Related to D. rufa, from which it is distinguished by its 

 greater proportional breadth, caused by the much more rapidly 

 increasing, slightly convex whorls ; the apex is less central, the 

 texture a trifle stouter and more polished ; the aperture instead 

 of being ovally rounded, is regularly transversely oblong, the 

 outer margin being much more gradually rounded ; and the 

 columellar much less oblique, thicker, and altogether more prom- 

 inent, more subangulate at its base. D. nubigena, Bourg., is even 

 nearer; but is a less elongately produced shell, less appressed, 

 the aperture more rounded and not subangulate at the columella, 



which is more oblique and less prominent. 



Mentone (subfossil). 

 D. LEDERI, Bottger. PI. 2, fig. 59. 



Shell large, umbilicated, unguiform, elliptically oval, spire 

 scarcely exceeding a fourth of the total length ; whorls 2^. 

 Length, 6'5 mill. 

 Animal blackish violet above, lighter on the sides, white 



beneath. Length, 13 mill. 



Transcaucasia. 



Resembles D. rufa, but is larger, more reddish brown, the 

 spire much smaller. 



D. BOTTGERI, Clessin. PI. 2, figs. 75, 76, 79. 



Shell very narrowly perforate, tectiform, elliptically oval; 

 diaphanous, shining, light corneous; obsoletely striate; spire 

 very small, with profound sutures ; whorls 2^, the last very large. 



Length, 5 mill. Crimea. 



The animal is blackish violet, with two darker lines on the 

 back and one on each side ; on the sides the color fades, the foot 

 being grayish white, marked with black. 



