HELIX. 227 



wall unidentate, peristome simple, expanded, strongly labiate with- 

 in, margins joined by a brownish callus. Diam. 19 mill. 



Persia f 



H. subcarinata, Menke and If. Cince, Klett are synonyms ; the 

 latter a juvenile. 



H. CALOPSIS, Bourg. PL 54, figs. 66-68. 



Moderately umbilicated, solid, subopaque, shining, striate, 

 whitish, with 10 unequal chocolate bands, variegated with white, 

 two superior and eight inferior ; whorls 6, subplanulate, carinate, 

 carina following the suture, rapidly increasing, the last dilated, 

 turgid below; peristome acute, white lipped within. 



Diam. 17 mill. 



Algiers. 



H. PISANIFORMIS, Bourg. PI. 54, figs. 64, 65. 



Subglobose, strongly striate ; whorls rounded, the last much de- 

 flected at the aperture, with three chestuut bands, of which the 

 lower one is narrow; aperture obliquely oval, peristome simple, 

 thickened within. Diam. 19 mill. 



Pays Comalis, E. Africa. 



I am inclined to believe the following three species only forms of 

 the above ; at least, the four reveal a common ancestry. 



H. COMALIANA, Bourg. PI. 54, figs. 69-71. 



Narrowly perforate, depressed above, convex below, subopaque, 

 rather solid, striulate, and submalleate towards the aperture, white, 

 with three chestnut zones; whorls 4, rapidly increasing, the last 

 large ; peristome slightly expanded, labiate within. 



Diam. 17 mill. 



Pays Comalis, E. Africa. 



H. TIANI, (Revoil) Bourg. PI. 54, figs. 72, 73. 



Narrowly perforate, convex above, more convex below, subopaque, 

 rather solid, strongly sharply striate and obscurely malleate ; whit- 

 ish, or with 3 or 4 chestnut zones ; whorls 4i, the last large, rounded, 

 descending in front ; peristome a little expanded, thickened within, 

 aperture yellowish. Diam. 18 mill. 



Pays Comalis, E. Africa. 



H. TOHENICA, Bourg. PI. 54, figs. 77-79. 



Scarcely rimate, equally convex above and below, solid, opaque, 

 ponderous, striulate, somewhat submalleate, white, with three chest- 



