124 HELIX. 



Var. HYBRIDA, Poir. PL 35, fig. 100. 



Peristome and parietal callus pale reddish. 



If. sauveuri, Colb. is synonymous. 



The hortensis is considered by many conchologists to be a variety 

 of H. nemoralis, with which the Var. hybrida connects it. 



H. VINDOBONENSIS, C. Pfr. PI. 34, figs. 89-93. 



Im perforate, globose conic, heavily striate, whitish or yellowish, 

 .with five unbroken deep brown bands, the upper two usually nar- 

 row ; whorls 5, the last large, convex, descending anteriorly; aperture 

 widely rotund-lunar, peristome brown, expanded, labiate, appressed 

 and flattened below, bearing on columella a white tipped callus. 



Diam. 20-25 mill. 



Central and Eastern Europe; Caucasus. 



The synonymy includes H. austriaca, Miihl., mutabilis Hartm. 

 arvensis, Kryn., and subaustriaca, Bourg. 



The bands are sometimes coalescent, but are usually more stable 

 than in other species of Tachea. 



Var. EXPALLESCENS, Ziegl. PI. 34, fig. 90, 91. 

 Bands obsolete, pale brown or wanting. 



Var. MINOR, Rossm. PI. 34, fig. 93. 



Small, globose ; altitude nearly equal to diameter. 



H. ATROLABIATA, Krynicki. PL 34, fig. 83. 



Large, depressed globose, imperforate, solid, rudely and irregular- 

 ly striate, somewhat malleate ; epidermis thin, yellowish, with one 

 to three deep, brown revolving bands ; spire conic, apex obtuse, whorls 

 5 to 6, the last rounded, descending anteriorly ; aperture widely lu- 

 nar, peristome deep brown, widely reflected and labiate, apprised 

 at umbilical region, margins joined by a dark callus, columellar 

 margin flattened, wide, thickened near the middle. Diam. 40 mill. 



Caucasus. 



H. calligera, and var. repanda, Dubois, and var. decussata, Bottg. 

 are synonyms. 



Var. STAUROPOLITANA, A. Schmidt. PL 34, fig. 86. 



More elevated, with more oblique aperture ; roughly malleate,. 

 and conspicuously fasciate. Diam. 35, alt. 21-25 mill. 



