— 212 — 



Patelloidea D'Orb. 1841. Voy. Amer. * 

 Genus Patellidarum. 

 COUTHOUY .... 



= Acmaea Eschsch. 

 Patelloideae Menke olira 1828. Syn. p. 52. 



Altera familia Calyptraeacearum. Genera : Scu- 

 tus , Fissurella , Emarginula , Calyptraea , Tre- 

 mesia. 

 = Patelloidea Fer. 

 Patelliis MoNTFORT 1810. Conch. syst. II. p. 66. Conf. 

 Helcion. 

 = Patella List. emend. 

 Patina Gray 1840. Syn. Brit. Mus. * Ed. 1842. p. 90. 

 Etym. Nom. appell. 

 Genus Patellidarum. 

 Patula Held 18.37. Isis p. 916. 

 Etym. Nom. adject. 



Genus Helicum. Typus: H. rotundata Miill. 

 Patularia Swains. 1840. Malac. p. 381. Cf. Sow. jun. Conch. 

 Man. ed. 2a p. 217. 

 Etym. Patulus. 

 Genus Anodontinarum. 

 PatulipaUa Latr. 1825. Fam. nat. (ed. Germ. p. 199.) Cf. 

 Desh. Enc. meth. III. p. 408. 

 Etym. Patulus; palla. 

 Primus ordo Conchiferorum. Sectiones: Mesomyona, 



Plagimyona. 

 Synon. Ostreacea Schw. 

 Ostracea Cuv. F^r. Menke. 

 Asiphonida Flem. 

 Atrachia Swains. 

 Paxlodon (Schum.) Blainv. 1825. Dict. sc. nat. tom. 38. 



p. 187. vid. seq. 

 Paxyodon Schum. 181.7. Ess. p. 139. 



Etym. An Pachyodon? Ttuxvs, crassus; odovg, 

 dens. 

 = Triquetra Klein. 



