HELIX. 239 



oval, white within and fasciate ; peristome white, the margins re- 

 mote, the right margin subsimple, the columellar dilated, sub- 

 straightened. Diam. 50, alt. 45 mill. (Kobelt.) 



Caucasus and Transcausia. 



It is the If. abichiana Bayer, in coll. 



This form is according to Kobelt, alwa} r s to be distinguished from 

 //. pomatia by the relatively lesser altitude and considerable widen- 

 ing of the last whorl ; the spiral sculpture is less distinct ; the mouth 

 is broader than in H. pomatia, and the columella less perpendicular 

 and more straightened. 



H. LUCORUM Miiller 1773. PL 67, fig. 93. 



Nearly covered perforate, depressed globose, solid, opaque white 

 h (originally) five deep chestnut bands, the second and third al- 

 most always coalescent, and frequently all above the periphery and 

 all below coalescent, with a narrow white peripheral zone, the first 

 bund however usually separate and very narrow; marked longitudi- 

 nally with occasional oblique brown streaks, more intense on the 

 bands showing the positions of the former peristomes ; lightly oblique- 

 ly striate, and sometimes showing very ill defined spiral lines ; spire 

 conic, apex obtuse, unicolored, sutures moderately impressed ; whorls 

 5, somewhat convex, gradually increasing ; body-whorl large, indent- 

 ed around the center below, gently deflexed anteriorly; aperture 

 oblique, rather small, lunate, colored same as the outside , peristome 

 slightly thickened, brown, the extreme edge whitish, upper and low- 

 er margins subparallel, not converging, joined by a thin brown 

 callus, upper and outer margins simple, basal more thickened and re- 

 nYxed, columellar margin reflexed, nearly covering the umbilicus and 

 slightly straightened within, short. Diam. 40-50, alt. 30-45 mill. 



Central Italy ; Balkan Peninsula; Asia Minor. 

 It is H. mutata of Lamarck. 



Var. CASTANEA Olivier. PL 59, fig. 58. 



Presents the following points of difference from H. lucorum : 

 the spire is more elevated and conic, body-whorl more depressed ; 

 whorls less rapidly widening; aperture smaller, more oblique, outer 

 lip more flaring, base with a light colored very heavy straight cal- 

 lus within ; bands coalescent into two. 



Constantinople. 



If. mahometana Bourg. is a synonym. 



Quite distinct and easily recognized by the conic form, small 

 aperture and callous columella. 



