1>-J,S IIKLIX. 



Yar. LITHOPIIAGA Conrad, 1852. 



Depressed convex, moderately thin ; volutions 5, those of the 

 spire flattened ; .suture margined by a carinated line; base convex ; 

 umbilicus rather large, but more than half covered by the lip, which 

 is widely reflected; color whitish varied with pale-brown irregular 

 angular spots in series of revolving lines, four on the large whorl ; base 

 without colored markings. (Conrad.) Diam. 32, alt. 18 mill. 



Wady en-Nar, below Deir Mar Saba. 



Remarkable for its habit of penetrating limestone rocks. 



The species seems to me to be a synonym of H. spiriplami. 



Var. MEDIA Mousson, 1874. Unfigured. 



( 'arina evanescent; elegantly marked with zigzag white lines. 

 Diam. 32-35 mill. 



Basin of Haleb. 



H. (tiviTATA Olivier, (1801 ?J PL 55, Hgs. 51, 52; pi. 66, fig. 73, 



74. 



Imperforate or covered perforate depressed globose, solid, opaque, 

 rather dull, fleshy whitish, with from two to four spiral girdles of very 

 obscure brownish spots ; obliquely striate, rather coarsely above ; 

 smoother below ; spire slightly convex, obtuse at summit, apex 

 rather large, smoother and more shining than the following whorls, 

 which are almost plane, and until the last, with linear sutures ; 

 whorls 5, the last more rapidly increasing without trace of keel, even 

 at its origin, deeply deflected anteriorly, scarcely indented in the 

 center below ; aperture transversely truncate-oval, very oblique, 

 showing livid bands within; peristome in every part reflected, white, 

 the basal margin straightened, callous, subdentate, expanded and 

 almost or completely covering the umbilicus at the insertion, the 

 terminations somewhat converging, and joined by a shining white 

 callus. Diam. 3, alt. 22. mill. 



Mesopotamia. 



The italicised passages in the above description will enable one 

 to separate this species from all of the preceding forms. 



Kobelt gives as the measurements of this form: diam. 28-38, alt. 

 15-20 mill. 



H. DscHULFKNsrs (Duboisj Bourg., 1857. PI. 55, figs. 42-44; pi. 



66, figs. 81-83. 



Covered umbilicate, or imperforate, more or less depressed, solid, 

 but thin and rather translucent, colored like H. gttttata, irregularly 



