242 HELIX. 



from H. pomatia, with which it has some superficial likeness. The 

 parietal wall has a very thin brown callus. 



Var. PR^STANS Blanc. Unfigured. Janina. 



H. SECERNENDA Rossmaessler, 1847. PI. 57, fig. 24. 



Imperforate, globose, solid, whitish, with five rather narrow dis- 

 tinct, generally well-defined, chestnut revolving bands, the second 

 and third sometimes subcoalescent, irregularly coarsely obliquely 

 striate, and lightly decussated by revolving lines ; spire conic, apex 

 blunt, shining, smooth; suture well impressed; whorls 4-4-1, mod- 

 erately convex, rapidly increasing, especially the last, which is glo- 

 bose, very slightly impressed around the axis, and slightly descending 

 anteriorly ; aperture oblique, ample, brownish gray, overlaid with 

 white within and showing the bands, rounded -lunate; peristome thick- 

 ened, brown with light edge, margins not approaching, outer and 

 basal margins subexpanded, the columellar dilated and adnate over 

 the axis, subvertical, rather straightened, dull brown, especially at 

 the insertion, and whitish ; parietal callus thin, light brownish. 



Diam. 43, alt. 43 mill. 



Da hunt it t. 



This is H. ligata var. Beck, H. ligata of Rossmaessler's Iconogru- 

 phie. 



This form differs from the last in the generally narrower more 

 distinct bands; more thickened peristome, much less impressed sut- 

 ures, and lighter colored columella. It is larger than H. ligata, has 

 the columellar lip more completely appressed and colored, not white, 

 as in the lighter form. 



H. LIGATA Miiller, 1773. PL 56, fig. 5. 



Nearly covered perforate, globose-conic, subsolid., yellowish or soil- 

 ed white, with five well-defined deep chestnut bands, which are gener- 

 ally narrower than their interspaces and usually separate; irregularly 

 obliquely coarsely striate, and decussated with fine spiral impressed 

 lines; spire conic, apex obtuse, smooth, unicolored corneous; sut- 

 ures moderately impressed; whorls 4s, somewhat convex, rapidly 

 widening, especially the last, and slightly descending anteriorly, ;i 

 little indented around the umbilicus; aperture oblique, rotund- 

 lunate, whitish, but showing the bands within ; peristome white, its 

 margins but slightly approaching, simple, the columellar margin 



