190 ZONITES. 



H. CALGARY, Aradas and Maggiore. PI. 57, figs. 100, 1. 



Somewhat narrowly umbilicated, very thin, elegantly decus- 

 sated above by growth striae and tine spiral lines, waxy, scarcely 

 striulate and very glabrous below, yellowish corneous, suture 

 impressed ; whorls 6, slowly increasing, the last large, rounded, 

 base subplanate. Diam. 23 5 mill. 



Sicily. 

 H. OBSCURATA, Porro. PL 57, figs. 2-4. 



Rather narrowly umbilicated, depressed, planulate, striulate, 

 shining, brownish corneous ; whorls 5j, rapidly increasing, the 

 last wide, periphery more or less compressed. Diam. 13 mill. 



Corsica. 

 II. PORROT, Paulucci. PL 57, figs. 5-7. 



Rather narrowly umbilicated, plain above, translucent, fragile, 

 shining, olivaceous corneous ; whorls 5J, slightly con vex, the first 

 one slowly, the last and penultimate rapidly increasing, suture 

 deep, periphery rounded. Diam. 165 mill. 



Genoa. 



N. Pini believes that this, and not the preceding form, is the 

 true H. obscurata, Porro. 



H. ANTONIANA, Paulucci. PL 57, figs. 8-10. 



Rather narrowly umbilicated, convex above, fulvous, corneous, 

 lighter colored below, opaque, shining, inconspicuously distantly 

 cingulate-striate ; whorls 6 J, flatly declining, the last two rapidly 

 increasing, suture deep, margined. Diam. 19 mill. 



Island of Sardinia. 



II. TROPiDoriiORA, Mabille. PL 57, figs. 11, 12. 



Moderately umbilicated, depressed, discoidal, striulate, shining, 

 brownish corneous; whorls 5^, somewhat flattened, the last 

 rapidly increasing, wide, periphery subangulated, suture deep. 



Diam. 20 mill. 



Corsica. 



Figured in Rossmassler as H. obacurata, Porro, and confounded 

 with that species b^y Pfeiffer and others. 



H. FULGIDA, Parreyss. PL 57, figs 13, 14. 



Rather narrowly nmbilicated, depressed, striulate, somewhat 

 solid, scarcety diaphanous, shining, fulvous above, corneous- 



