MACROCYCLIS. 20:} 



lita are mostly from Madagascar; those of Lysino'e are from 

 Mexico and Central America ; and the minute shells form- 

 ing the group Vallonia are found under stones and loose 

 earth in Europe and the United States of America. 



Species of Macrocyclis. 



Banksii, Cuming. Forbesii, Pfeiff. 



Cuuiughami, Gray. laxata, Ferns. 



Sub-gen. ampelita, Beck. 



Shell widely umbilicated, thin, depressed, last whorl protracted, 

 anteriorly deflexed, passing angulately into the large umbilicus 

 at the base ; peristome reflexed, the margins contiguous, united 

 by a callus. 



Atropos, Ferns. laux, Ferns. 



Clotho, Ferus. Madagascariensis, Lam. 



concisa, Ferns. omphalodes, Pfeiff. 



consanguinea, Ferus. sepulchralis, Ferus. 



galactostoma, Pfeiff. sulcosa, Pfeiff. 



granulosa, Ferus. unicolor, Pfeiff. 



Lachesis, Ferus. Xystera, Valenc. 



laucula, Ferus. zodiaca, Ferus. 



Sub-gen. lysinoe, H. and A. Adams (Aglaia, AVbers, not 



Renieri). 



Shell umbilicated, orbiculately convex, pilose, last whorl com- 

 pressed about the umbilicus ; aperture lunately rotund ; peri- 

 stome expanded, shortly reflexed, the margins contiguous, the 

 columellar dilated. 



Ghiesbreghtii, Nyst. Hogoleuensis, Le ChiiUou. 



