ANODONTJTES 1 427 



the shell ; dorsal and ventral outlines rounded ; anterior end 

 round ; dorsal slope obliquely truncate ; surface with irregular 

 growth lines ; epidermis dull, somew^hat cloth-like, often with 

 faint, radial, thread-like lines, greenish or brownish, occasion- 

 ally with yellowish bands ; nacre flesh-color, or bluish-tinted, 

 bright and iridescent ; muscle scars faint. 



Length 78, height 45, diam. 28 mm. 



Cartagena, Colombia. 

 Anodonta trantimniana Lea, Tr. Am. Phil. Soc, X, 1852, p. 



287, pi. XXVI, fig. 48 ; Obs., \^ 1852, p. 43, pi. XXVI, fig. 48. 

 Margaron (Anodonta) trauhviniana Lea, Syn., 1870, p. 81. 

 Anodon trauHvinianus Sowerry, Conch. Icon., XVII, 1870, 



pi. XXXIII, fig; 134. 

 Margaron (Anodonta) troutiviniana Lea, Syn., 1852, p. 51. 

 Glabaris trautitnnianus Simpson, Syn., 1900, p. 922. 

 Anodonta troiitunniana. Clessin, Conch. Cab. Ano., 1874, p. 



112, pi. XXXVI, figs, I, 2. 

 f Anodon ovatns Swainson, Ex. Conch., 1841, pi. xxxvi. 

 f Anodonta carthagcna , Who? Where? 



This species seems to be almost equally related to this group, 

 to that of crispatus and that of trapesialis. 



Anodontites MONTEZUMA (Lea). 



Shell almost regularly short elliptical, convex, inequilateral ; 

 thin ; beaks full but not greatly elevated ; anterior end a little 

 narrowed, rounded, slightly cut away below ; dorsal and basal 

 lines rounded, the latter full just behind the middle ; posterior 

 end rounded, very slightly produced about on the median line ; 

 epidermis rough, yellow and green ; anterior scars distinct ; 

 posterior scars confluent ; nacre white and iridescent. 



Length 42. height 29, diam. 13 mm. 



Central America. 

 A^nodonta monte.'smna Lea, Pr. Am. Phil. Soc. II, 1841, p. 31 ; 



Tr. Am. Phil. Soc. 1842, p. 240, pi. xxiii, fig. 55 ; Obs., Ill, 



1842, p. 78. pi. xxiii, fig. 55. — Clessin, Conch. Cab. Ano., 



1876, p. 220, pi. Lxxii, figs. 7. 8. 

 Margaron (Anodonta) montezuma Lea, Syn., 1852, p. 51 ; 



1870, p. 82. 

 Glabaris nionte.znma Simpson, Syn., 1900, p. 923. 



