232 HELIX. 



descending at the aperture; peristome simple, acute, white-lipped 

 within, columellar and basal margins slightly patulous. 

 Diam. 12 mill. 



Algiers. 



H. SIMULATA, Fer. PL 55, figs. 27-29. 



Narrowly umbilicated, regularly costate-striate, whitish or greyish, 

 with or without chestnut or chocolate, more or less interrupted 

 bands; whorls 5; peristome acute, labiate within. Diana. 13 mill. 



Syria, Egypt. 

 ? If. striatula, Beck is a synonym. 



H. CAMEEATA, Mousson. PI. 56, figs. 30, 31. 



Perforate, rather thin, smoothish, lightly striate, whitish, marbled 

 with yellowish brown or chestnut, with an interrupted dorsal band, 

 and narrow indistinct ones on the base ; whorls 6, slowly increasing, 

 the last declining, obsoletely angular, with rounded base ; peristome 

 simple, widely but thinly labiate within. Diam. 15 mill. 



Mogador, Morocco. 

 H. COLOMESIANA, Bourg. PI. 56, figs. 32-34. 



Rather narrowly umbilicated, solid, chalky, not shining, whitish, 

 or with interrupted light chestnut zones, or with rare, obsolete 

 variable maculations, costulate-striate, apex black ; whorls 6, a little 

 convex, slowly regularly increasing, with impressed suture, last 

 whorl narrow, rounded, slightly deflected above ; peristome acute, 

 white-or yellowish-lipped within. Diam. 18 mill. 



Algiers. 



According to Morelet and others this is a synonym of H. caperata, 

 var. Mogadorensis, Lowe, the latter having a carinated periphery 

 which is supposed to indicate juvenility. I am not satisfied with 

 this approximation. See Journ. de Conch. 35. 1880. 



H. PELLUCENS, Shuttlew. PI. 56, figs. 35, 36, 



Perforate, thin, closely obliquely striate, diaphanous, fulvous, with 

 darker more or less interrupted bands and lines; whorls 6, the last 

 not descending, base ventricose ; peristome acute, sublabiate within. 



Diam. 12.7 mill. 



Corsica. 



H. PARVA, Parr. PI. 56, figs. 37, 38. 



Very narrowly umbilicated, striulate, a little shining, brownish 

 yellow, apex corneous; whorls 5*, the last with a white subangulated 

 periphery; peristome acute, labiate within. Diam. 9*6 mill. 



Sardinia. 



