184 PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



1850. Crenea [pars] : Albers, Heliceen, p. 77. [Non Risso, 1826.] 



1892. Xeroclivia : Monterosato, Atti R. Accad. Palermo, ser. in, vol. ii 



[Classe Sci., No. 2], p. 25 (with the further sectional names : 

 Xeronexa and Xerocochlea.] 



1893. Tropidocochlis [pars] : Locard, Echange, ix, p. 97. 



The result of the foregoing investigations is to show that the 

 species ranged by Ferussac under Helicella must be redistributed 

 into the following families and genera : — 



Family TESTACELLIDffi. 



Genus Ehytida, Albers. 



[AplostomcB : HyalincB.) 

 capillacea, Fer. 



Family CIRCINARIID-ffil. 



Genus Circinaria, Beck. 



{Aplostomw : Hyalince.) 



planorhoides, Rafinesq. [= concava, Say]. 



Genus Zophos, Gude. 



(AjdostomcP' : Hyalince.) 

 concolor, Fer. 



Family ZONITIDffi. 



Subfamily ZONITINJE. 



Genus Mesomphix, Rafinesque. 

 {AjplosiomcB : Hyalince.) 

 IcBvigata, Rafinesq. 



Genus Zonttes, Montfort. 



(Aplostomce : Verticilli.) 

 verticillus, Fer. 

 algira, Linne. 

 gemonense ? Fer. 



Genus Vitrea, Fitzinger. 



{Aplostomce : Hyalince.) 

 crystallina, Miiller. 

 hyalina 1 Fer. [= diaphana, Stud.]. 



Genus Helicella, Ferussac. 

 Subgenus Helicella, s.s. • 

 {Aplostomce : Hyalince.) 



glaphyra, Say [= cellar ia, Miill.], 



cellaria, Miiller. 



glabra, Studer. 



nitens, Maton & R. [= ? alliaria, Miller]. 



