212 HELIX. 



This form, which inhabits the more western mountains, is in gen- 

 eral shape scarcely to be distinguished from many forms of the Sicil- 

 ian H. globularis, but may be readily recognized by the sculpture 

 and the columellar lip, which is not appressed. To the H. tetuan- 

 ensis it holds about the same relation as globularis to platychela. 



(Kobelt.) 



H. GYROSTOMA Feruss^c, 1821. PL 54, figs. 20, 21. 



Covered perforate, globose, lightly obliquely striatulate, whitish- 

 gray (bleached ?) with numerous small opaque white flecks, and 

 larger, more translucent grayish markings ; this gray is above form- 

 ed into flam mules somewhat, and below into two narrow bauds ; 

 and upon these translucent tracts the white flecks are principally 

 distributed ; whorls 4, the first relatively large, the second and third 

 flatter, appearing decidedly carinated in the suture, the last inflated, 

 well rounded, very strongly deflexed anteriorly ; aperture very ob- 

 lique, comparatively small, circular, the terminations of the peristome 

 joined by a thick shining white callus, its margins briefly expanded, 

 white. (Martens.) Diam. 19s, alt. 12^ mill. 



Tripoli. 



In the early part of the century this Helix Avas found in Tripoli, 

 and communicated by Dr. Leach to Ferussac; and again in 1879 a 

 single example was taken by Dr. Erwin von Barry, in the first 

 range of the Tarhuna Mountains. 



PI. 50, figs. 55, 50 are copied from the original figures of Ferussac. 



H. SCHERZERI Zelebor, 1868. PI. 60, figs. 86-88. 



Imperforate, globose-depressed, rather thin, striatulate, whitish, 

 with sparsely scattered corneous points or also with five continuous 

 brown bands; spire slightly elevated, apex obtuse; whorls 4?, 

 slightly convex, the last inflated, anteriorly profoundly deflexed ; 

 aperture very oblique, subcircular, peristome albolabiate, the mar- 

 gins approximating, joined by a callus, briefly reflexed, the columel- 

 lar obsoletely unidentate within, dilated and appressed above the 

 axial region. (Pfei/er.) Diam. 20, alt. 11 mill. 



Gibraltar. 



This species is distinguished from the preceding and the following 

 species, to which it stands nearest, by the entirely closed umbilicus. 

 The columellar reflection is however perfectly sharply defined, and 

 distinctly visible. From the H. marmorata, with which it lives, it 

 may be separated always by the white lip. (Kobelt.) 



