— 277 — 



Placobrancliiis Van Hasselt 1824. BuU. sc. nat, p. 240. * 

 Etym. Tila^, lamina; ^Qayxia, branchiae. 

 Novum genus Nudiliranchialorum. 



Pariter Cuv. 1830. R. a. ed. 2a (ed. Voigt. III. 

 p. 125.) 

 Blainv. 1825. 3Ial. p. 627. — in Polybranchiis di- 



ceris. 

 Rang 1829. Man. p. 1.34. — genus Placobranchorum. 

 Wenke 18.30. Syn. ed. 2a p. 10. — in Dorideis. 

 Desh. 1830. Enc. meth. III. tabl. et 1832. ib. p. 772. 



— Placobranchia — in Tritonianis. 

 D'Orb. 1841. Moll. Cub. I. p. 108. — genus Placo- 



branchidarum. 



Pariter Gray 1842. Syn. Brit. Mus. p. 90. 

 QuATREF. 1844. Ann. sc. nat. 3e ser. I. p. 129. * et 



1845. Compt. rend. * — in Plebenteratis Entero- 



branchiis. 

 LovEN 1846. Ind. MoU. Scand. occ. p. 8. — in Eo- 



lideis. 

 PIaco$9tyliis Beck 1837. Ind. p. 57. 



Etym. nla^, lamina; Givlog, columna. 



Subgenus Bulimi sectionis crassilabrium. Typus : Bu- 



limus bootis Menke. 

 Synon. Voluta (sp.) Chemn. Gmel. Dillw. 



Auricula (sp.) Lamck. 



Cochlogena subdiv. Donlostoraae sect. prima Fer. 



Pupa (sp.) Gray. 

 Placuiia SoLANDER teste Chemn. 1785. Syst. Conch. Cab. 



VIII. p. 116. 

 Etym. nXaxovg^ placenta. 

 Ab Anomiis segregatum genus. Typus: An. pla- 



centa L. 

 Adoptat Brug. 1792. Enc. meth. tab. 174. 175. — 



minus bene insertis Plicatulis. 

 HuMPHR. 1797. Mus. Calonn. * 

 Cuvier 1798. Tabl. elem. * 

 Lamck. 1799. Prodr. * 



