ZONITES. 147 



H. RIGIACA, Bourg. PL 48, figs. 10-12. 



Narrowh' perforate, compressed, whitish crystalline, shining, 

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

 in front, somewhat flattened below, suture well impressed. 



Diam. 9 mill. 



Mt. Pdgi, Switzerland. 



H. DIAPHANELLA, Kryii. PI. 48, figs. 13-15. 



Umbilicus moderate, shell depressed, snbplane 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. multispira } Pfr., 

 and H. Taurica, Clessin. 



H. TESTJS, 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 obliquely 

 narrowly lunate. Diam. 12'5 mill. 



Sicily. 



The synonyms are H. Plrilippi, Testa, //. Ganinij Benoit, and 

 H. Musignani, Parr. 



Var. ROSSMASSLERI, TVesterlund. 



Shell smaller, more widely umbilu-ated ; whorls C, more rapidly- 

 increasing. Diam. 10 mill. 



Sicily. 

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



Moderately profound!}' umbi Heated, subdiscoidal, thin, ob- 

 liquel3 T striulate, corneous-white below; whorls 7, regularly 

 narrowly increasing, the last somew4iat dilated and descending 

 towards the aperture, slightly compressed on the base, aperture 

 obliquely widelj' lunate. Diam. 11 mill. 



Sierra de Guadarrama, Spain. 



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



Umbilicated, depressed, closely striate above, somewhat 

 shiny, corneous, smooth and whitish below ; whorls 5, slowly 



