50 NER1TINA. 



white ; columellar area plane, rugulose, bluish white, blackish be- 

 hind, distinctly arcuately circumscribed. Diam. 5-6'5 mill. 



IsL of Sardinia. 

 N. gymnocephala, Kiister is a synonym. 



IS". PELOPONNESIA, Recluz. PI. 16, fig. 50. 



Rugosely striulate, blackish violaceous, Avith transversely oblong 

 white maculations ; columellar area white, a little wrinkled, nar- 

 row, flat, aperture brownish grey. Diam. 8 mill. 



Central Greece. 



It is N. Baetica, Desh., and N. melanoleuca, Kiister. 



IS". NUMIDICA, Recluz. PL 16, figs. 51, 52. 



Varying from semiglobose to transversely semiovate, rugosely 

 striulate, purplish black, with white dots, or yellowish reticulated 

 with black ; columellar area plane, slightly rugulosely scabrous, 

 bluish white. Diam. 6-9 mill. 



A Igeria. 



The transverse form recalls N. fluviatilis, Linn. The synonyms 

 -are N. Baetica, Morelet, N. algira, Kuster, 'N. fluviatilis, Poiret, N. 

 Prevostiana, Terver. 



N. SYRIACA, Bourg. PL 17, fig. 53. 



Transversely semiovate, slightly rugosely striate, black, sometimes 

 with minute white spots; columellar area plane or a little concave, 

 slightly rugulose, bluish. Diam. 6 mill. 



Beirut, etc., in Syria. 

 N. PALLIDA, Dunker. PL 17, fig. 57. 



Lightly striulate, greyish yellow, nearly unicolored ; columellar 

 area plane, very slightly rugulose, whitish. Diam. 4 mill. 



Persepolis, Persia. 



It is N. Sehirazensis, Parr. 



K SCHULZII, Grimm. PL 17, figs. 58-60. 



Quadrately semiglobose, rugosely striate, light yellowish ; body 

 whorl depressed above and obtusely biangulated, aperture sub- 

 quadrate, the peristome continuous, columellar margin plane, punc- 

 tate-rugulose, yellowish white. Diam. 7 mill. 



Caspian Sea. 



This shell has much the appearance of a Pileopsis ; fig. 60 is 

 probably from an abnormal specimen. 



