VITRINA. 145 



suture, the apex minute, the last whorl transversely dilated, 

 scarcely descending ; aperture transverse, large, the columellar 

 margin arcuated, not reflected ; umbilical region somewhat 

 depressed. Diam. 7, alt. 4 mill. 



Mts. of Abruzzi, Italy. 

 Y. BONELLII, Targioni-Tozzetti. PL 31, figs. 43, 44. 



Depressed, greenish yellow, whorls 3, very rapidly increasing, 

 slightly striate, more distinctly so at the suture ; aperture 

 rounded ovate. Diam. 5, alt. 3'5 mill. 



Tuscany. 



Unfigured Species. 



Y. SERVAINIANA, St. Simon. Near Luchon, Pyrenees. 



Y. CARNIOLICA, Bottger. Carniola. 



y. REITTERI, Bottger. Western Montenegro. 



Y. BICOLOR, Westerlund. Switzerland, Pyrenees. 



y. AMPULLACEA, Jan. Sicily. 



y. HIEMALIS, Koch. Oetzthal, Tyrol. 



y. RUGULOSA, Koch. Turkestan. 



y. MEXICANA, Beck. Undescribed. Mexico. 



Section OLIGOLIMAX, Fischer, 1878. 

 y. ANNULARIS, Stiider. PI. 31, figs. 45-48. 



Depressly globose, rather smooth, thin, pellucid, somewhat 

 shining, greenish- hyaline ; spire obtuse, whorls 3, moderately 

 increasing, the last rounded, wide at base; aperture rounded 

 oval, columellar margin short, subvertical ; umbilicus perforate. 



Diam. 4, alt. 2*75 mill. 



Mts. Switzerland, France, Piedmont, Caucasus, Pyrenees. 



The synonyms are Helix imputa, Studer ; V. subglobosa, Mich. ; 

 V. demulans, Ad., and probably the unfigured V. plicosa, Bielz, 

 of Transylvania. 



y. KOMAROWI, Bottger. PL 31, figs. 49, 50. 



Shell proportionally wider for its height, brownish instead of 

 greenish, the spire more convexly conoidal, the whorls (3^) 

 more slowly increasing, the embryonal whorl broader, the last 

 whorl more descending than V. annularis. 



Diam. 4'75, alt. 3'5 mill. Caucasus. 



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