ANODONTITES 1 445 



Anodonta lingitlata Hupe, Moll. Noiiv., Ill, 1857. p. 89, pi. 



XVIII, fig. I.— Ci.ESSiN, Conch. Cab. Ano., 1875, P- 215, pi. 



LXVI, fig. 3. 

 Anodon lingtilota Sowkrhy, Conch. Icon., XVII, 1869, P^- 



XXIII, fig. 90. 

 Margaron (Anodonta) Imgiilata Lka, Syn., 1870, p. 79. 

 Glaharis lingulafa von Iiiering, Arch, fiir Nat., 1893, P- HQ- 

 Glabaris lingidatus Simpson, Syn., 1900, p. 929. 



A fine, solid, almost regularly elliptical species. Hupe has 

 evidently given erroneous measurements, for he says "Long., 

 100; haut., 92; epaiss., 40 mill." 



The shell seems to be more ponderous and more evenly ellip- 

 tical than any of the related forms. 



Anodontite.s mortonianus (Lea). 



Shell long rhomboid or subelliptical, rather solid, inequilat- 

 eral, subinflated ; beaks slightly prominent ; posterior ridge 

 somewhat double, sometimes with two or three slight, radial 

 ridges and depressions ; dorsal and basal outlines more or less 

 curved, the latter full behind the middle ; anterior end round- 

 ed, occasionally subangulate above ; dorsal slope obliquely 

 truncate ; surface rather finely, concentrically sculptured ; epi- 

 dermis olive^brown to blackish ; nacre whitish or flesh-colored, 

 iridescent. 



Length yy, height 41.5, diam. 30 mm. 



Length 79. height 41.5, diam. 26 mm. 



Length 79, height 39.5, diam. 26.5 mm. 



Parana River, South America. 

 Anodonta mortoniana Lka, Tr. Am. Phil. Soc, V, 1834, p. 80, 



pi. XIII, fig. 7,y\ Obs., I, T834, p. 192, pi. XIII, fig. 2,7- — Cles- 



siN, Conch. Cab. Ano., 1874, p. 151, pi. xlviii, figs. 5, 6. 

 Margarita (Anodonta) mortoniana Lea, Syn., 1838, p. 30. 

 Anodon mortoniana Cati.ow and Reeve^ Conch. Nom., 1845, 



p. 67. 

 Margaron f Anodonta) mortoniana Lea, Syn., 1852. p. 150; 



1870, p. 80. 

 Glaharis nwrfonianiis Simpson, Syn., 1900, p. 929. 



