ZON1TES. 191 



white below, suture impressed; whorls 6, subplanulate, regularly 

 slowly increasing, the last subdilated, depressed, periphery 



rounded. 



Sicily. 

 H. obsctirata, Benoit, non Porro. 



H. ISSELIANA, Paulucci. PI. 57, figs. 15-17. 



"Rather narrowly unibilicated, depressed, planulate above, thin, 

 fragile, rugosely striulate, olivaceous corneous ; whorls 5^, at first 

 slowl}-, afterwards rapidly increasing, suture profound, last whorl 

 planulate above, compressed below. Diam. 15'5 mill. 



Central Italy. 

 H. MERIDIONALIS, Paulucci. PI. 58, figs. 20-22. 



Rather widel}' uinbilicated, depressed, planorbiform, planulate 

 above, thin, fragile, pellucid, yellowish olivaceous, lighter colored 

 below; whorls 5^-6, regularly increasing.; the last wider, com- 

 pressed, subdilated towards the aperture, a little descending, 

 suture well-impressed. Diam. 15 mill. 



Central Italy. 

 H. INCERTA, Drap. PL 57, figs. 18, 10. 



Moderately uinbilicated, shining, smooth, striulate, brownish 

 corneous above, yellowish white below, suture impressed, minutely 

 wrinkled ; whorls 5 j, peripheiy rounded. Diam. 18 mill. 



Southern France. 



Formerly confounded with H. olii'etorum, Gmel., but is smaller, 

 more globose, with narrower umbilicus, etc. 



Var. YAFRA, Westerlund. 



* 



Olivaceous corneous above, dark greenish below, last whorl 

 wide, aperture ovatel} T lanate, columellar margin widely expanded 

 above, spire produced conoidal. Diam. 26 mill. 



Bayonne. 

 H. SUPERFLUA, Rossmassler. PI. 58, figs. 23-25. 



Umbilicated, depressed, rather solid, with incremental striae 

 above, decussated by very minute spiral lines, diaphanous, some- 

 what shining, cinnamon-color, spire rather plane, suture im- 

 pressed ; whorls 5^-6, somewhat convex, the last whorl striate 

 and white on the base. Diam. 18 mill. 



Ins. Crete. 



