ZON1TES. 147 



II. RioiACA, Boui-g. PL 48, figs. 10-12. 



Narrowly perforate, compressed, whitish crystalline, shining, 

 smooth; whorls 6, regularly enlarging, the last a little dilated 

 in front, somewhat flattened below, suture well impressed. 



I Ham. 9 mill. 



Mt. Eigij Switzerland. 



II. DIAPHANELLA, Kryn. PI. 48, figs. 13-15. 



Umbilicus moderate, shell depressed, subplane below, thin, 

 diaphanous, shining, smooth, grayish white or yellowish ; whorls 

 7, planulate, the last attenuated, suture slightly impressed, sub- 

 duplicate. Diam. 7 mill. 



Crimea. 



It is H. diaphana, Kryn. (preoccupied), H. muUispira^ Pfr., 

 and H. Taurica, Clessin. 



II. TESTAE, Phil. PI. 48, figs. 16-18. 



Umbilicated, minutely striate, smooth, yellowish corneous 

 above, lighter colored below; whorls 7, narrow, slowly increas- 

 ing, the last expanding towards the aperture, aperture obliquety 

 narrowly lunate. Diam. 12*5 mill. 



Sicily. 



The synonyms are H. Philippi, Testa, //. Ganini, Bcnoit, and 

 H. Musignani, Parr. 



Yar. ROSSMASSLERT, Westerlund. 



Shell smaller, more widely umbilieated ; whorls G, more rapidly 

 increasing. Diam. 10 mill. 



Sicily. 

 H. PAZI, Bourg. PI. 48, figs. 19-21. 



Moderately profoundly umbilicated, subdiscoidal, thin, ob- 

 liquely striulate, corneous-white below; whorls 7, regularly 

 narrowly increasing, the last somewhat dilated and descending 

 towards the aperture, slightly compressed on the base, aperture 

 obliquely widely lunate. Diam. 11 mill. 



Sierra de Guadarrama, Spain. 



H. BALMEI, Shuttleworth. PL 48, figs. 22-24. 



rinbilicated, depressed, closely striate abovo, somewhat 

 shiny, corneous, smooth and whitish below; whorls f>, slowly 



