932 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



tGLABARIS ENSIFORMIS Spix. 



"" Anodon ensiformis Spix, Test. Fluv. Bras., 1827, p. 31, pi. xxiv, figs. 1, 2. — 

 "^Catlow and Keeve, Concli. Nom., 1845, p. 66. — * Sowerby, Couch. Icon., 

 XVII, 1867, pi. XI, fig. 31. 



* Iridina ensiformis Lea, Syn., 1836, p. 57. 



"" Anodonta ensiformis Hanley, Test. Moll., 1842, p. 223; '^Biv. Shells, 1843, p. 

 223.— * d'Orbigny, Voy. Am. Mer., 1843, p. 618, pi. lxxix, fig. 10.— * Kus- 

 TER, Conch. Cab. Ano., 1853, p. 8, pi. ii, fig. 12. — * H. and A. Adams, Gen. Rec. 

 Moll., II, 1857, p. 503.— * ? Cheku, Man., 1859, II, p. 146, fig. 721.— *P^tel^ 

 Conch. Sam., Ill, 1890, p. 179. 



* Margarita (Anodonta) ensiformis Lea, Syn., 1838, p. 32. 



"" Margaron {Anodonta) ensiformis Lea, Syn., 1852, p. 51; 1870, p. 82. 



Tropical South America.^ 



t GLABARIS FALSUS Simpson.* 



Yuruari River, a branch of the Orinoco. 



tGLABARIS LEGUMEN von Martens. 



"" Anodonta legumen VON Martens, S. B. Nat. Ft., 1888, p. 65. ' 

 Southern Brazil. 

 The following are unfigured or indeterminate siDCcies of Glaharis, 



"Anodon hrevis Sowerby, Conch. Icon., XVII, 1870, pi. xxxi, fig. 124. 

 La Plata, South America.^ 



* Anodon ])orcifer Gray, Pr. Zool. Soc. Lond., 1834, p. 58. 

 Paraguay. 



*?7«io {Anodontes) spixii d'Orbigny, Guar. Mag., 1835, p. 39.'' 

 Brazil. 



^Anodon cheeziana Sowerby, Conch. Icon., XVII, 1867, pi. xv, fig. 52. 

 Probably a Glabaris. 



'^Anodonta nicaragua Piiilippi, Zeits. fiir Mai., V, 1848, p. 130. 

 Mcaragua. 



'The three very peculiar species of this section seem to show relationship with G. 

 xvheatleyi and G. clessini. 



• Shell elongated, rather thin, subrhomboid and pointed at the posterior base, 

 slightly rayed on the low, rounded posterior ridge; beaks low; epidermis olive 

 green, somewhat cloth-like; hinge line nearly straight; anterior scars deep; 

 escutcheon small, dark; nacre shaded bluish and greenish, lurid purplish in the 

 center, iridescent behind. Length, 76 mm. ; height, 21 mm. ; diameter, 11 mm. 

 This was supposed by Dr. Lea to be ensiformis and I thought it was that until a 

 more careful examination convinced me of its distinctness. It is a smaller, thinner, 

 more rhomboid shell, and has a somewhat cloth-like epidermis, while that of ensi- 

 formis is smooth. I regret that I can not figure this species, aud that I must describe 

 it in a footnote, but I only discovered that it was a distinct species as the Synopsis 

 was about ready for the press. 



">1 can not tell what this is. If it is a true Glabaris, it would be the type of a. 

 group perhaps near G. tenebricosus. 



•*D'Orbigny refeas to figures in Spix, but his references are badly mixed up. 



