ZONITES. 151 



H. DEILA, Bourg. PI. 49, figs. 66-71. 



Narrowly umbilicated, with impressed umbilical region, finely 

 striate, moderately solid, fulvous olivaceous, olivaceous-white 

 below ; whorls 6, regularly slowl}' enlarging, aperture large, 



semi-rounded. Diam. 17 mill. 



Near Sebastopol, Crimea. 



H. deila (figs. 66-68) was described from a specimen not fully 

 adult. 11 mill, diam.; subsequently Clessin describing an adult 

 specimen, thought proper to give it a new name H. Krynicki 

 (figs. 69-71). 



H. MARGARITACEA, Schmidt. PI. 49, figs. 72-74. 



Widely umbilicated, thin, rather smooth, bluish white, dia- 

 phanous ; whorls 4J, the last neither dilated nor deflected, mouth 

 Innately rounded, peristome fragile, repand. Diam. 10'5 mill. 



Aschersleben, Germany, Denmark? 



Some conchologists have considered this an albino of H. cel- 

 laria. 



H. SCOTOPIIILA, Stefani. PI. 49, figs. 75-77. 



Umbilicus small, profound, shell subplanulate, rather solid, 

 smooth, shining, pellucid, yellowish corneous above, whitish 

 below, irregularly lightly striate ; whorls 5, regularly enlarging, 

 suture distinct, last whorl a little declined, scarcely or not at all 



descending at the aperture. Diam. 10'5 mill. 



Sienna. 

 Is H. Aquitanica of Bonelli and Martens (non Charp.). 



H. ERCICA, Benoit. PL 49, figs. 78-80. 



Moderately umbilicated, polished, diaphanous, dark olivaceous 

 corneous; whorls 5, suture impressed. Diam. 10 mill. 



Sicily, Calabria. 



Benoit first called it //. ylaberrima a name several times pre- 

 occupied. 



H. PLANELLA, Ptr. PL 49, figs. 81-83. 



Rather narrowly umbilicated, subdiscoidal, fragile, rugulosely 

 striate, corneous, spire subplanate; whorls 5, suture impressed, 

 last whorl wider, somewhat depressed, periphery obsoletely 



angulate, base somwhat plane. Diam. 10 mill. 



Sicily. 



