134 HELIX. 



H. ALABASTRITES Michaud. PI. 40, figs. 20-22. 



Imperforate, depressed globose, lightly striate, shining, white, 

 sometimes with five pale bands ; spire convex, obtuse ; whorls 5 r 

 flattened, the last compressed, obsoletely angulate, profoundly de- 

 flexed anteriorly; aperture subhorizontal, truncate-ovate; peristome 

 labiate, slightly expanded, extremities converging, connected by a 

 light callus, columella with a thick callus. Diam. 24 mill. 



Oran, Algiers. 



N. soluta Mich, is a synonym. 



A forma minor has been noted by Ancey, diam. 20 mill. Easily 

 recognized by the great obliquity of mouth, solid texture and sub- 

 angulate whorls. 



H. ATLASICA Mousson. PL 37, figs. 69-71. 



Imperforate, globose-depressed, lightly striate and decussate, 

 smooth, shining, white, greyish or brownish, with five bands, the 

 three upper usually more or less confluent, and variegated with 

 patches of white; spire slightly convex, summit not prominent; 

 sutures linear ; whorls 4-5, the last large ; aperture oblique, trans- 

 versely ovate ; peristome acute, expanded, labiate with white ; ends 

 not converging, connected by a light callus; columella thickened 

 within. Diam. 22 mill. 



Atlas Range of Western Morocco^ 



H. ALCYONE Kobelt. PL 40, figs. 23-25. 



Imperforate, depressed-conic, somewhat thick, smoothish, shining, 

 finely striate, whitish, with four conspicuous corneous-brown bands, 

 broken into cloudy maculations, with intermediate corneous patches ; 

 whorls 5, regularly coiled, the last widened at aperture, slightly 

 tumid below ; aperture very oblique, transversely ovate ; peristome 

 and columella white, fauces reddish ; columella straight. 



Diam. 28; alt. 16 mill. Southern Morocco. 



H. JUILLETI Terver. PL 41, figs. 26, 27. 



Imperforate, . subglobose-conoidal, rather solid, shining, lightly 

 irregularly striate, and with very minute spiral lines, slightly mal- 

 leate, white, with irregular corneous maculations, especially above ; 

 banded with four or five reddish brown zones; whorls 6, regularly 

 increasing, upper ones someAvhat flattened, the last a little dilated,, 

 profoundly deflexed anteriorly ; base convex ; aperture very oblique. 



