1400 LHII.A 



Concholo£;;ically this genus seems to be very closely related 

 to Anodontitcs, especially to the group of A. trapesiaUs. Some 

 of the shells of that genus have a slight dorsal wing in front 

 and behind, and traces of a pallial sinus. 



l/Eii.A i;i.AiN\iLij:ANA (Lea). 



Shell obovate. subinflated, bihiant, ine(|uilateral, subsolid ; 

 beaks rather full, long and high : posterior ridge narrowly 

 rounded ; above the ridge there is a wide, radial depression ; 

 dorsal line nearly straight, produced into a pointed wing in 

 front and a slopingly truncate one behind ; anterior end very 

 narrow, nnich cut away below ; base rounded, much fuller be- 

 hind the middle : i:»osterior end bluntly pointed at or below 

 the median line ; surface with irregular growth lines ; epider- 

 mis dark olive, with indications of delicate, radial stride; hinge 

 line edentulous ; ligamental patches triangular ; muscle scars 

 shallow ; nacre flesh-colored : pallial line with a broad, shallow 

 sinus behind. 



Length 153. height 93, diam. 54 mm. 



Peru ; Brazil ; south to Argentina. 

 Anodonta blainrillcana Lea, Tr. Am. Phil. Soc, V, 1834, p. jy, 



pi. XII, fig. 35; Obs., I, 1834, p. 189, pi. XII, fig. 35. — Han- 



i.EY, Biv. Shells, 1843, p. 222, pi. xxiv, fig. 18. 

 Margarita f Anodonta) blainvillcana Lea, Svn., 1836, p. S3; 



1838. p. 31. 

 Anodon blainvilleana Cati.ow and Reeve, Conch. Nom.. 1845, 



p. 66. • 



Margaron (Anodonta) hlamvilleana Le^\, Syn., 1852, p. 52. 

 L.cila hlahrrillcana H. and A. .Adams, Gen. Rec. Moll., IL 1857, 



p. 507; III, pi. cxTX, figs. 4, 4a. — Chenu, Man.. 1859. IL p. 



148, fig. 730. — Simpson, S.vn., 1900, p. 915. 

 Coluniha blainvillcana Clessin. Conch. Cab. Ano.. 1876, p. 



253. pi. LXXXVI, figs. I. 2. 

 Anodon parishii Gray, Pr. Zool. Soc. Lond.. 1834, p. ^y. 

 Margarita (Anodonta) parishii 'Lv.x. Syn.. 1836, p. ^t^\ 1838, 



P- 3T. 

 Anodonta parishii Haneey. Test. IMoll., 1842, p. 222. 

 Margaron (Anodonta) parishii Lea, Syn.. 1852, p. 52. 



