ANOnONTlTES 1443 



end obliquely truncate above, meeting the dorsal line with an 

 angle, rounded below ; surface with rather strong growth lines ; 

 epidermis dark brown; nacre white in the cavities, iridescent 

 or green at the borders. 



Length 66, height 35, diam. 22 mm. 



Brazil. 

 Anodonta iveddellii Hupe, Moll. Nouv., III. 1857, p. 87. pi. 



XVII, fig. 5.— Ci.ESSiN, Conch. Cab. Ano., 1876, p. 214, pi. 



LXVI, fig. I. 

 Anodon zvcddellii Sowerbv, Conch. Icon., XVII, 1868, pi. xx, 



fig. 80. 

 Margaron (Anodonta) iveddellii I,ea, Syn., 1870, p. 79. 

 Glabaris iveddellii vSimpson, Syn., 1900, p. 928. 



Shorter in proportion to height, and not so cylindrical as 

 A. onia.-jonensis. 



Anodontitrs elongatu.s (Swainson). 



Shell much elongated, solid, subinllated, inequilateral, sub- 

 rhomboid when adult, long ovate when young; beaks rather 

 full and high ; hinge line lightly arched, the curve extending 

 almost evenly to the post-basal point of the shell ; anterior end 

 evenly rounded; base nearly straight, in old shells sometimes 

 a little incurved : surface with delicate growth lines, sometimes 

 with very faint indications of radial sculpture ; epidermis rich 

 reddish-brown, shining; nacre brilliant, flesh-colored or pale 

 rose, richly iridescent ; anterior scars impressed ; posterior 

 scars large, distinct. 



Length 74, height 36, diam. 25 mm. 



Brazil. 

 Anodon elongatus Swainson, Zool. 111., ist Ser., Ill, 1823, pi. 



CLXXVI. 



Margarita (Anodonta) elongata Le.v. Syn., 1836, p. 53 ; 1838, 



P' 32. 

 Anodonta elongata Hani.ey, Test. Moll. 1842, p. 223. 

 Anodon elongata Catlow and Rkevk, Conch Nom 184s n 



66. ■' 



Glabaris elongatus Simpson, Syn.. 1900, p. 928. 



