156 ZON1TES. 



Var. YILL^E, Morlillet. Figs. 42-44. 



A larger, flatter form, from southern slopes of the Alps, Lom- 

 bardy and Tyrol. It is H. Mortilleti and H. eugyra of Stabile. 



Var. SICULA, Rossm. Figs. 45. 46. 



Of normal form, but somewhat larger. 



Sicily. 



Yar. SANCTA, Bourg. Figs. 41, 49. 



Shell larger, more deeply colored and less pellucid ; whorls 

 more convex, the last less depressed. Diam. 15 mill. 



Syria, Palestine. 

 Yar. CANARIJE, Mousson. Figs. 50-52. 



Spire a little less depressed, umbilicus slightly wider, last 

 whorl scarcely perceptibly more broadly developed. 



Canary Islands. 

 H. CHELIA,. Bourg. PL 50, figs. 53-55. 



Umbilicus moderate, somewhat depressed, shining, subpellucid, 

 elegantly striate above, corneous, lighter below ; whorls 6, slightly 

 convex, regularly enlarging, the last rounded, slightly dilated, a 

 little compressed below, suture profound. Diam. 15 mill. 



Algiers. 



Distinguished from H. cellaria by the sculpture. 



H. PILATICA, Bourg. PI. 50, figs. 56-58. 



Moderately umbilicated, plane above, diaphanous, shining, 



milky white, very smooth ; whorls 4^-5, flattened above, rounded 



below, the last whorl somewhat dilated in front. Diam. 4 mill. 



Mt. Pilatus, Switzerland, Savoy, Bordeaux, France. 



Much smaller than H. cellaria, the last whorl more rounded 

 below, and the aperture more rotund. According to Clessin and 

 Westerlund this is H. clara, Held, which has priority. 



H. PICTONICA, Bourg. PL 50, figs. 59-61. 



Rather widely umbilicated, lenticular, shining, pellucid, cor- 

 neous above, light greenish white below, nearly smooth, but 

 striate at the suture; whorls 6, suture impressed, whorls slowly 

 enlarging, the last slightly larger than the penultimate, a little 



compressed below the aperture. Diam. 12'5 mill. 



France. 



Differs from H. cellaria in its more slowly increasing whorls, 

 and less developed last whorl, also in color and striae. 



