146 VITRINA. 



Y. SIEVERSI, Mousson. PI. 31, fig. 51. 



Minutely perforate, depressly convex, heliciform, very thin 

 and fragile, pellucid, light corneous; spire convex, the apex 

 small, obtuse ; whorls 4, convex, with strong striae near the 

 suture, the last whorl large, depressed-rounded, smooth and 

 more shining below; aperture round-oval, the lip slightly 

 reflected at the umbilicus. Diam. 5*8, alt. 3'2 mill. 



Caucasus. 



The shell looks like a Helix, but the animal is said to be too 

 large. Described as a Heliearion. It, as well as the preceding 

 species, has been made a synonym of V. annularis, but they 

 both appear to be very distinct from that species. 



V. PAULUCCI^E, Fischer. PI. 31, figs. 52, 53. 



Yery minutely perforate, orbicularly subglobose, thin, fragile, 

 pellucid, scarcely shining ; whorls 3J, convex, obliquely striate 

 and obsoletely plicatulate ; aperture oblique, transversely ovoid, 

 the lip regularly arcuate, touching the perforation. 



Diam. 3'5, alt. 2-3 mill. 



Aspromonte, Calabria. 



Yery closely allied to V. annularis, perhaps identical with it. 



Y. EUGOSA, Paulucci. PL 31, figs. 54-56. 



Yery minutety perforated, rugose, orbicularly depressed, 

 fragile, hyaline, light yellowish, strongly ribbed at the suture ; 

 whorls 3^, convex, rather rapidly increasing, the last wider, 

 rounded, subcompressed in the middle, dilated at the aperture 5 

 aperture transversely ovate, the columellar margin lightly arcu- 

 ated and reflected. Diam. 5, alt. 3 mill. 



Abruzzi, Italy. 



Probably only a variety of V. annularis. 



Y. MUSIGNANI, Mandralisca. PL 81, figs. 57-59. 



Subglobose, pellucid, hyaline, thinly elegantly striate, whorls 

 3, the last subangulate, aperture rounded, spire a little exserted. 



Diam. 4, alt. 2 mill. 



Sicily. 



This is also too closely allied to V. annularis. 



Y. EXILIS, Morelet. PL 31, figs. 60, 61. 



Subperforate, rather convexly depressed, very thin, pellucid, 

 hyaline, very lightly and distantly striate ; suture impressed, 



