ANODONTITKS 



1407 



Anodontites vvYMANii (Lea). 



Shell long- obovate, rather solid, convex or subinflated, in- 

 equilateral ; beaks but little elevated or inflated ; dorsal outline 

 arched ; anterior end narrowed and rounded ; base rounded, a 

 little fuller behind the middle; dorsal slope obliquely sub- 

 truncate ; posterior end somewhat biangulate about at the me- 

 dian line ; surface irregularly, concentrically striate ; epidermis 

 cinnamon red to brownish ; ligamental patch narrow, elon- 

 gated : muscle scars well marked ; nacre rose-tinted, with a 

 brownish-red prismatic border. 



Length 80, height 50, diam. 30 mm. 



L^ruguay River, South America. 

 Anodonta zvymanii Li5a, Pr. Ac. N. Sci. Phila., IV, i860, p. 91 ; 



Jl. Ac. N. Sci. Phila., V, 1863, p. 390, pi. xi.iv, fig. 294; Obs., 



X, 1863, P- 26, pi. xrjv. fig. 294.— Clrssin. Conch. Cab. 



Anc, 1873, p. 104, pi. xxxiT, figs. I, 2. 

 Margaron (Anodonta) wymanii Lea, Syn., 1870, p. 80. 

 Anodon wymarti SowivRp.y, Conch. Icon., XYII, 1870, pi. xxx^ 



fig. 117. 

 Glaharis wymanii Simpson, Syn.. 1900, p. 917. 



More elongated and more richly colored than A. patagoni- 

 nis. It is quite richly colored within as well as without. 



ANODONTrrKS siRiONis (d'Orbigny). 



Shell oblong almost evenly elliptical, subsolid to rather thin, 

 convex or subinflated, inequilateral ; beaks moderately full and 

 elevated ; dorsal slope obliquely subtruncate ; surface rather 

 strongly and irregularly, concentrically striate, sometimes 

 showing faint radiating lines of wrinkles ; epidermis greenish 

 to brownish, scarcely shining; ligamental scars triangular ; 

 muscle scars shallow : nacre bluish-green, sometimes with pur- 

 plish tintings. 



Length 87, height 50, diam. ;^y mm. 



Rio de la Plata. 

 Anodonta sirionis d'ORBiCNv, Mag. Zool, 1835, p. 40; Voy, 



Am. Mer.. 1843, P- ^15, pi. lxxiv, figs. 4-6; lxxx, figs. 1.4. 



— ClK-SStn, Conch. Cab. Ano., 1874, p. 128, pi. xli, figs. 1,2. 

 Margarita (Anodonta) sirionis Lra, Syn., 1838, p. 31. 



