154 /ON1TES. 



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

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



Near Blidah, Algeria. 

 II. DURANDOIANA, Bourg. PL 49, figs. 12-14. 



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

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

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

 last whorl a little dilated and oblique at the aperture. 



Diam. 11 mill. 



Prou. Gonstantine, Algeria. 

 II. DUMONTLANA, Bourg. PL 49, figs. 15-17. 



Widely umbilicated, fragile, diaphanous, shining, corneous, 

 distantly narrowly costulate above, smoother below; whorls 

 4-4J, somewhat convex above, more convex below, i-apidly 

 enlarging, suture impressed, last whorl rounded. 



Diam. 3 mill. 



Grande Chartreuse, Savoy. 

 II. PETRONELLA, Charp. PI. 49, fig. 18. 



Moderately umbilicated, 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. 



Alps of Switzerland, Norway . 



It is H. viridula, Wallenb. 



Var. SUBNITIDOSA, Mousson. 



Superior striae less distinct, light corneous white, last whorl 



well rounded. 



Russian Transca ucaxid. 



II. 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. 6'5-7 mill. 



Near Gerfalco, If alt/. 



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

 occupied by Stabile. Is perhaps a young H. olivetorum. 



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



Narrowly umbilicated, somewhat lenticular, pellucid, shining, 



