1434 ANODONTITES 



AywdoM siiiuosis Swainson, Ex. Conch., 2d ed., 1841, p. 29, 



pi. XVI. 



Glaharis siiuiosus Simp.son. Syn., 1900, p. 925. 



The hini;e line in this species is decidedly sinuous and in 

 some cases the lunule passes back under the beaks. As in the 

 other species of the group, the anterior base gapes. It may be 

 only a variety of trapesialis. 



Anodontites GRijALV.ii (Morelet). 



Shell very large, solid, very much inflated, inequilateral, ir- 

 regularly elliptical ; beaks enormously large, full and high ; 

 hinge line arched behind, nearly straight or lightly incurved 

 in front ; anterior end narrow ed, rounded, subangulate above ; 

 base rounded, full behind the middle ; posterior end rounded, 

 slightly more prominent on the median line ; surface with 

 rude, unequal, concentric striae; epidermis brownish-black; 

 nacre flesh-colored ; muscle scars shallow. 



Length t6t, height 100, diam. 95 mm. 



Tabasco, Mexico. 

 Anodonta grijalvcc INRirelet, Jl. de Conch., XXXI, 1884, p. 12. 



— Fischer and Crosse,, Miss. Sci., II, 1894, p. 532, pi. lxix, 



figs. T, I a. 

 Glabaris grijakrc Simpson, Syn., 1900, p. 926. 

 Anodonta grijolocc P.TvTEI,, Conch. Sam., Ill, 1890, p. 180. 



This species, which is apparently related rather closely to A. 

 trapesialis, is greatly inflated, solid, has a dark epidermis and 

 higher, larger beaks than Lamarck's shell has. 



Anodontites glaucus (Valenciennes). 



Shell varying from long elliptical to somewhat short obo- 

 vate, scarcely subsolid, not very inequilateral ; subinflated, gap- 

 ing at the anterior base and slightly behind ; beaks moderately 

 full and elevated, slightly wrinkled at the tips ; hinge line arch- 

 .ed behind the beaks, straight or a very little incurved in front 

 of them ; anterior end rounded, usually subangulate above ; 

 base rounded or lightly curved, often fuller behind the middle ; 

 dorsal slope obliquely truncate or subtnuicate ; posterior end 



