1450 ANODONTITES 



A comparatively short, somewhat intiated species which has 

 a decidedly rhomboid outline. Tt is rather shorter in propor- 

 tion to its heig'ht than . /. tcnebricosus and is more rhomboid 

 and arcuate. 



Anodontites solentformis (d'Orbigny). 



Shell elongated, falcate-rhomboid, subcompressed, scarcely 

 subsolid, ine(|uilateral ; beaks low, subcompressed ; posterior 

 ridge full, widely rounded ; dorsal outline lightly arched ; base 

 incurved medially ; anterior end a little narrowed, rounded.; 

 posterior end obliquely truncate above, rounded below ; epider- 

 mis dull, lurid, greenish-brown, sublamellous, often faintly 

 rayed behind ; nacre very dark, lurid, with bluish, greenish and 

 brownish tints, iridescent ; prismatic border wide. 

 Length 75, height 28. diam. 15 mm. 

 Brazil, south into Argentina. 

 Anodonta soleniformis d'ORBiGNY, Guer. Mag., 1835, p. 41 ; 

 Voy. Am. J\'Ier., 1843. P- 617, pi. i.xxiv, figs, i, 3. — Clessin, 

 Conch. Cab. Ano., 1873, p. iii. pi. xxvii, fig. i. 

 Margarita I Anodonta) soleniformis Lka, Syn., 1838, p. 32. 

 Margaron (Anodonta) soleniformis Lea, Syn., 1852, p. 53; 



1870. p. 83. 

 Glabaris soleniformis \on Ihering, Arch, fiir Nat., 1893, p. 59. 



— Simpson, Syn., 1900, p. 930. 

 Anodon solenidea Sowerby, Conch. Icon., XVII, 1867, pi. 



XVIII, fig. 65. 

 Margaron (Anodonta) solenidea Lea, Syn., 1870, p. S^. 



Several specimens of this species, donated to Dr. Lea by 

 d'Orbigny are before me. They are a little narrower in front 

 than behind, and falcate, being much more elongated and 

 compressed than A. tenrbricosns. 



Anodontites clessin i (Fischer). 



Shell somewhat elongate, subinflated, arcuate-rhomboid, 

 subsolid, inequilateral ; beaks moderately full ; dorsal line light- 

 ly arched ; base incurved medially ; anterior end rounded or 

 lightly cut away below ; posterior end obliquely rounded or 



