HELIX. 13 



H. CARIOSULA, Mich. PL 2, figs. 51, 52. 



Subimperforate, carinate, globosely convex above, carious, 

 somewhat flattened below, soiled white, with a tubercularly 

 eroded filiform sutnral carina ; whorls 5, somewhat flattened; 

 upper margin of aperture subdeflected. Diam. 18 mill. 



Algiers. 

 H. MAYRANI, Gassies. PI. 2, figs. 53-55. 



Imperforate, carinate, gr arm lately crispate under the rusty 

 epidermis, flatter below, flesh white, with a filiform peripheral 

 carina, evanescent in front ; whorls 5-6, convex, the last with 

 radiating striae above, suture profound. Diam. 19-20 mill. 



Algiers. 

 Var. SUBCARIOSULA, Bourg. Fig. 55. 



Granulations stronger, base less swollen, keel sharper. 

 H. Kobeltiana, Debeaux, is a synonym. 



Yar. DEBEAUXI, Kobelt. 



Globosely trochoidal, calcareous, soiled white ; whorls very 

 distinctly crenated at the suture, tuberculosely rugose, the last 

 whorl obsoletely angulated, smoother and shining below, base 

 convex, excavated around the umbilical region. 



H. OCTINILLA, Bourg. 



Umbilicus covered or rimate, turbinately convex above, 

 planulate below, whitish, strongly rugose above ; whorls 5^, 

 strongly tuberculate at the suture, carinate below, the last 

 compressedly carinate, the base subtumid, radiately plicately 

 striate. Diam. 17-22 mill, alt. 10-12 mill. 



Or an, Algiers. 



Unfigured. 



H. cariosula, var. vetula, Westerl., is a synonym. 



H. CARIOSA, Olivier. PL 2, figs. 56-59. 



Umbilicated, carinated, convex, white, rough, crispately 

 rugulose ; whorls 5, the last scarcely deflected in front, angu- 

 lated around the wide, deep umbilicus. Diam. 18 mill. 



Syria. 

 Var. NAZARENSIS, Mouss. 



Half bullet-shaped, swollen, the last whorl angulated only at 

 the periphery, upper surface thickly grained. 



