140 HELIX. 



H. ODOPACHA Bourguignat. PI. 42, figs. 49-52. 



Imperforate, depressed globose, ventricose, shining, slightly sul 

 pellucid, white, striate and malleate ; apex smooth, 'obtuse ; spii 

 convex ; whorls 5, regularly increasing, the last rounded, abrupt! 

 deflexed anteriorly; aperture oblique, narrow, subtriangular-oblon^ 

 pale brown inside ; peristorae white, thickened, patulous ; columelh 

 margin thickened, bearing a heavy brownish callus, terminating i 

 a thick tubercle ; margins connected by a light callus. 



Diam. 24 mill. Oran, Algier 



A variety is figured by Kobelt with four narrow brown band 

 The species is very closely allied to H. arabica. 



H. BONDUELLIANA Bourguignat. PL 37, figs. 67, 68. 



Imperforate, ventricose, solid, bright, chalky, lightly striate an 

 obscurely malleate, bluish-white, obscurely unifasciate; spire conve: 

 apex small, obtuse, smooth ; whorls 5, regularly and rapidly i: 

 creasing, the last descending anteriorly ; aperture oblique, luna 

 ovate, white within ; peristome sublabiate, expanded ; columel 

 margin with a white callus. Diam. 28 mill. 



Oran, Algier 



H. asteia Bourg. is more deflected at aperture and has dark< 

 mouth, with the columella callus slightly more developed. Said 

 be from Madrid, Spain, but referred to H. bonduelliana, by Hidalg 

 who considers it an African species. (PL 42, fig. 53.) 



H. SENILIS Morelet. PL 42, figs. 54, 55. 



Imperforate, globose depressed, dilated transversely, thick ; whor 

 5 2, planulate, the last dilated and deflexed anteriorly, fourbandec 

 aperture truncate-oval, subhorizontal ; peristome very thick, reflexe 

 margins connected by a callus ; columella dentate. Diam. 25 miJ 



Between Constantine and Setif, Algier 



H. EMBIA Bourguignat. PL 42, figs. 56-57. 



Covered perforate, depressed subglobose, solid, chalky whit 

 striatulate and malleate, spire convex, apex smooth, obtuse ; whor 

 5 to. 6, the upper ones flattened, the last two convex ; suture mo< 

 erately impressed ; last whorl rounded, tumid below, at the apertu] 

 suddenly descending; aperture oblique, irregularly lunate, dec 

 chestnut within, with a tooth on the base, and opposite it a slig] 

 prominence inside the outer lip ; peristome broadly expanded, la 

 iate, margins connected by a white callus, Diam. 23, alt. 15 mill 



Island of Habibas, off Algier 



