10 HELIX. 



H. ACUTISTRIA, Bottger. PI. 2, figs. 73-75. 



Moderately umbilicated, white, unicolored, or with a single 

 chestnut l)and above and five interrupted narrow bands below ; 

 whorls 5, rapidly increasing, with deep suture, .convex, closely 

 covered Avith thread-like striae, last whorl scarcely descending, ob- 

 tusely angulated, angle vanishing towards the aperture ; peristome 

 simple, acute, remotely white-lipped within. Diam. 9-10 mill. 



Tiflis, Transcaucasia. 



This species has been recently referred to H. crenimargo (Vol. 

 Ill, p. 252), as a var. obtusior. 



H. CANDIDULA, Studer. PL 1, figs. 44-48. 



Narrowly umbilicated, minutely striate, whitish, uuicolored or 

 variously banded with brown ; whorls 4J-5, slightly convex, the 

 last scarcely deflected in front ; peristome acute, internally thick- 

 ened. Diam. 9 mill. 



Middle Europe. 



The synonyms are H. unifasciata, Poir., H. bidentata, Drap., H. 

 striata, Var. Drap., H. graphica, H. rugellosa, and H. striatula, 

 Hartm., H. azona, H. unizona and H. radiolata, Audrz., If. elegans, 

 Fleming. 



Var. ALPICOLA, Stabile. 



Small, cretaceous, globosely depressed, rather thin, with narrow, 

 pale, interrupted bands, evanescent, aperture more rounded. 



Diam. b''5 mill. 



Var. THYMORUM, Alt. 



Turbinately depressed, obtuse, more or less striate, porcellanous 

 or yellowish, with a chestnut baud above, and sometimes with in- 

 ferior lines ; last whorl flattened above, obtusely angulated, con- 

 vex below ; peristome white-lipped within. 



Var. GRATIOSA, Ziegler. 

 Shell much larger. 



O 



H. strigatula, Hartm., and H. adnumerata, Parr., are synonyms. 



Var. SPIRILLA, Westerl. 



Narrowly umbilicated, depressed, costu late - striate, yellowish, 

 usually with a superior chestnut band ; whorls 4i-5, the last di- 

 lated, planate above, obtusely angulated, base convex; aperture 

 angulated above and below, widely 2-3 labiate within, columella 

 short, forming an angle with the basal lip. Diam. 4'6 mill. 



Southern France, Sicily. 



