— 20 — 



Hargarltaiia Schum. contfn. 

 Synon. contin. 



Monodonta Say olim et Alasmodonta Say. 



Alasmidon(a Say. Rafin. 



Unio Oken. Turt. 



Damaris Leach. 



Alasmodon Flem. Rafin. Gray. Swains. Thomps. 



Gould. 3Iacgill. 

 Complanaria, Calceola, Uniopsis Swains. 

 Iflargaritirera Humphr. 1797. Mus. Calonn. * 

 Etym. Margarita; fero. 

 = Avicula Klein (teste Swains.) 

 JUarsaritipliora Muhlf. 1811. Entw. p. 66. 



Etym. (.laQyaQitis , margaritaj (psQco, fero. 

 = Meleagrina Larack. 

 margaritites Auctt. * tesle Agass. Nom. 



Etym. {[.laQyaQXtig, margarita.) Margarita. 

 ?= Meleagrina Lamck. 

 INEarsioatae Fer. 1819. Prodr. p. 47. et Rang 1829. Man. 

 p. 164. 

 Subdivisio Helicostylae. Typus : Helix Studeriana Fer. 

 = Helicostyla Beck, Stylodon De Crist. et Jan, 

 Geotrochus Van Hass., Otala Schum. 

 Harelnella Lamck. 1799. Prodr. * etl80I. Syst. an. p. 75. 

 et 1802. Ann.duMus.il. p. 60. (ed; Germ.p.55.) 

 Etym. Margo. 

 Genus Cephalaeorum a Volutis disjunctum. Typus: 



Voluta glabella Linn. 

 CuviER 1800. Anal. comp. * 1817. R. a. * 1830. 

 Ibid. ed. 2a (ed. Voigt. III. p. 301.) — subgenus 

 Volutae. 



Pariter Schweigg. 1820. Naturg. p. 73 L 

 RoissY 1805. Moll. VI. p. 7. 



Lamck. 1809. Phil. zool. et 1822. Hist. VII. p. 354. 

 (ed. 2a X. p. 432.) — genus Columellarium. 

 Pariter Latr. 1825. Fam. nat. 

 PuscH 1837. Pol. Paliiont. p. 117. 



