1454 ANODON'TITKS 



posterior margin by a shallow excavation. Three diverging 

 ridges extend from the beaks to the hinder end, the upper of 

 which forms the projecting angle, which I have mentioned. 

 The largest specimen has a length of 52 and a height of 36 

 mm. But I have already received this variety from Mucury, 

 represented by considerably larger and thicker specimens, of 

 which the largest has a length of 60 mm." (von Ihering). 

 Glabaris obtusa juparana von Ihkking, Abh. Senckenb. Ges.,. 

 XXXII, 1910, p. 131. 



Anodontites lituratus (Spix). 



Shell rather small, ol^ovate, somewhat inflated, subsolid, in- 

 ecjuilateral ; beaks full and high ; dorsal and basal outlines 

 slightly curved ; anterior end narrowed and rounded ; poste- 

 rior end almost evenly rounded, slightly fuller below ; surface 

 of the shell greenish, with numerous radial spots or broken 

 rays of darker color ; nacre iridescent, purplish-tinted. 



Length 42, height 28 mm. 



Brazil. 

 Anodon obtusus var. b. lituratuni Spix, Test. Fluv. Bras., 1827, 



p. 30, pi. xxii, fig. 4. 

 Anodonta littiirata Hupe, Moll. Nouv., 1857, p. 87, pi. xvii,. 



fig. 4. 

 Anodon litiirato Sowerby, Conch. Icon., XVII, 1868, pi. xx, 



Glabaris lituratus Simpson. Syn.. 1900, p. 931. 



Probably a valid species, though Dr. Lea believed it to be 

 the same as A. obtusus. It seems to be a smaller species, is 

 more inflated and solider than obtusus. The epidermis differs 

 in being green, and having, for the most part, broken rays. 

 According to Hupe's figure the nacre is purplish. 



Section Virgula Simpson, 1900. 



p'irgula SiMT'SON, Syn.^ 1900, p. 931. 



Shell subsolid to solid, moderately inflated, greatly elon- 

 gated, straight or falcate, rounded in front, sharply pointed 

 at the posterior base, where the high, sharply defined posterior 



