ZONITES. 141 



convex, with deep suture, the last whorl nearly double the width 

 of the penultimate, aperture rather widely semilunar. 



Diam., 3 mill. 



Mts. in Moravia, Galicia, Bukowina, 



Switzerland, Italy. 



Marchioness Paulucci makes this a variety of H. diaphana, 

 Studer. 



Unfigured or doubtful Species. 



H. HUMULICOLA, Mabille. Northern France. 



H. SECRETA, Bourg. Spain, Southern France. 



H. ANDREI, Boettger. Switzerland. 

 H. KUTSCHIGI, Parreyss. /wx. Lacroma, near Ragusa. 



H. PODOLICA, Clessin. Prov. Podolia, Russia. 



H. VITREOLA, Bourg. Spain, So. France. 



H. SORELLA, Mousson. Russian Transcaucasia. 



II. Group of H. diaphana, Studer (Diaphanella). 



H. ANGYSTROPHA, Bottger. PI. 46, figs. 38-40. 



Shell minute, imperforate, vitreous, shining, spire depressed 

 conical; whorls 6^-7, narrow, nearly of equal width, suture 

 deeply impressed, last whorl obtusely carinate superiorly. 



Diam., 3 mill. 



Kutais, Transcaucasia. 

 H. APALISTA, Bourg. PI. 4C>, fig. 41. 



Imperforate, h} T aline, diaphanous, white, very thin, smooth, 

 spire somewhat convex; whorls 6, regularly increasing, suture 

 margined. Diam., 4 mill. 



Algiers. 



H. CONTORTULA, Krynicki. PL 46, figs. 42, 43. 



Imperforate, depressed, hyaline, translucent; whorls 7-8, 

 narrow, very slowly enlarging, the last scarcely wider than the 

 penultimate, periphery rounded, aperture narrowly lunar. 



Diam., 4 mill. 



Caucasus, Transcaucasia. 



H. DIAPHANA, Studer. PL 47, figs. 51-53; PL 46, figs. 44-46, 

 47,48. 



Scarcely subperf orate, vitreous, diaphanous, smooth, very 



