148 XONITES. 



increasing, the last depressed, not descending, periphery very> 

 obsoletely angulatcd, suture profound. Diam. 12 mill: 



Id. Sardinia. 



H. Balmei, Potiez et Midland, is a true Helix and = H. 

 flauida, Zicgler, but the shell which Pfeitfer and other authors 

 have identified with that species, and which Shuttleworth lias 

 figured in his " Notitue " is a Hyalina, and so may continue to 

 bear the name given it under a misapprehension. This rectifi- 

 cation is one of the numerous debts which conchological science 

 owes to the learning and patient research of the Marchioness 

 Paulucci (Jour, de Conch., 6, 1879). Shuttleworth's MS. name 

 opaca is a synonym. 



H. OPPRESSA, Shuttleworth. PI. 48, figs. 25-2?. 



Widely umbilicated, depressed, obliquely striate, somewhat 

 shining, orange corneous; whorls 5, flattened above, more 

 convex below, periphery angulated, aperture wide. 



Diam. 11 mill. 



/.s/. Sardinia. 



H. LIBYSONIS, Paulucci. PI. 48, figs. 28-30. 



Umbilicated, light yellowish corneous, discoidal, somewhat 

 flattened, subopaque, rugosely striulate above, faintly stimulate, 

 somewhat shining and subtranslucent below, yellowish corneous ; 

 whorls 6, slowly enlarging, periphery obsoletely angulated. 



Diam. 10 5 mill. 



Isle of Sardinia. 



This is H. opaca of Adami and Paulucci, not of Shuttleworth. 



H. ALBINELLA, Paulucci. Pi. 48, figs. 31-33. 



Moderately umbilicated, discoidal, diaphanous, opaque, fragile, 

 somewhat flattened and irregularly striulate and subcrispate at 

 the suture above, more convex and very shining below ; corneous 

 white or light corneous; whorls 6-7, regularly enlarging, the 

 last wider, depressed rounded, suture deeply impressed, very 

 narrowly margined. Diam. 13-16 mill. 



Me of Sardinia. 

 II. NEVILLTANA, Paulucci. PI. 48, figs. 34-36. 



Widel}'' umbilicated, discoidal, diaphanous, shining, somewhat 

 solid, corneous, convexly depressed and obsoletely striulate 



