144 ZONITES. 



H. HYDATINA, Rossm. PI. 47, figs. 74, 75. 



Narrowly perforate, whitish, pellucid, striulate ; whorls 5, 

 suture margined, base subplanulate, aperture widely obliquely 



semilunar. Diam. 6'25 mill. 



Isl. Corfu, Smyrna, Naples. 

 It is H. seminula, and H. cuma, Chierigh.; H. diaphana, Muhlf. 



H. LATEBRICOLA, Bourg. PI. 47, figs. 76-78. 



Narrowly perforate, compressed, white, diaphanous, pellucid, 

 smooth, slightly elegantly striulate ; whorls 5, subplanulate, 

 regularly enlarging, suture impressed, last whorl with obscure 

 peripheral angle. Diam. 5 mill. 



Megara, Greece. 



H. PSEUDOHYDATINA, Bourg. PI. 47, figs. 79, 80. 



Differs from H. hydatina by its smaller size, less globose whorls, 

 suture not margined, aperture less oblique, narrower, superior 

 margin not arcuate, perforation narrower. 



France, Italy, Portugal. 



This shell was for a long time confounded with H. hydatina, 

 Rossm., a species which does not exist in Western Europe. 



H. TARGIONIANA, Paulucci. PI. 47, figs. 81, 82. 



Narrowly perforate, white, crystalline, fragile, polished ; whorls 

 5^-6, suture profound, last whorl wide, rounded, aperture widety 



lunate. Diam. 4 mill. 



Inland of Sardinia. 



H. CAVANN^S, Paulucci. PL 47, figs. 83-85. 



Moderately umbilicated, depressed, whitish, diaphanous, vitre- 

 ous, slight!}' elegantly striate ; whorls 5, slowly regularly enlarg- 

 ing, with well-impressed suture. Diam. 3 mill. 



Mte. Morone, in the Abruzzi, Italy. 



The striae are too strong and the umbilicus too wide for Yitrea, 

 whilst the small size and numerous whorls exclude it from the 

 section Polita. 



H. VERMICULUM, Lowe. PL 47, figs. 86, 87. 



Perforate, smooth, vitreous, shining ; whorls 4^-5, slowly 

 increasing, slightly striulate at the suture. Diam. 5-6 mill. 



Isl. Teneriffe. 



