154 ZONITES. 



vous corneous, smooth, last whorl substriulate ; whorls 5, suture 

 well impressed, last whorl a little dilated. Diam. 9 mill. 



Near Blidah, Algeria. 

 11. DURANDOIANA, Bonrg. PL 49, figs. 12-14. 



Umbilicus moderate, thin, pellucid, shining, narrowly striu- 

 late, striae stronger at the suture, smoother and more shining 

 below, corneous, lighter on the base ; whorls fi, suture impressed, 

 last whorl a little dilatt d and oblique at the aperture. 



Diam. 11 mill. 



Prov. Constantine, Algeria. 



H. DUMONTIANA, Bourg. PL 49, figs. 15-17. 



Widely nmbilicated, fragile, diaphanous, shining, corneous, 

 distantly narrowly costulate above, smoother below; whorls 

 4-4^, somewhat convex above, more convex below, rapidly 

 enlarging, suture impressed, last whorl rounded. 



Diam. 3 mill. 



Grande Chartreuse, Savoy. 



H. PETRONELLA, Charp. PL 49, fig. 18. 



ModerateLv nmbilicated, globosely depressed, greenish white, 

 vitreous, shining, closely regularly costulate-striate, smooth 

 below ; whorls 4^-5, slowly enlarging, suture impressed, mar- 

 gined, last whorl rounded, a little dilated and subplanate in 

 front, not descending. Diam. 4'5-5'5 mill. 



/ ^j 



Alps of Switzerland, Norway. 

 It is H. viridula, Wallenb. 



Var. SUBNITIDOSA, Mousson. 



Superior strijB less distinct, light corneous white, last whorl 



well rounded. 



Russian Transca ucasia. 



H. GERFALCHENSIS, Pecchioli. PL 50, figs. 19-21. 



Widely umbilicated, umbilical region concave, striate, diaph- 

 anous, more convex below, greenish, fulvous; whorls 4, with 

 deep suture, regularly enlarging. Diam. fi'5-7 mill. 



Near Gerfalco, Italy. 



First described by Pecchioli as //. Morlilleti, a name pre- 

 occupied by Stabile. Is perhaps a young //. olivelorum. 



H. CAMELINA, Bourg. PL 50, figs. 22-24. 

 ' Narrowly umbilicated, somewhat lenticular, pellucid, shining, 



