918 PROCEEDINGS OF THE NATIONAL MUSEUM. 



* Margaron (Anodonta) wymanil LEA, Syu., 1870, p. 80. 



T Anodon wymani SOWERBY, Conch. Icon., XVII, 1870, pi. xxx, fig. 117. 



Uruguay River, South America. 



fGLABARIS SIRIONIS d'Orbigny. 



* Anodonta sirionis D'ORBIGNY, Mag. Zool., 1835, p. 40. ' HANLEY, Test. Moll., 



1842, p. 221; * Biv. Shells, 1843, p. 221.* D'ORBIGNY, Toy. Am. Mer., 1843, 

 p. 615, pi. LXXIV, figs. 4-6; LXXX, figs. 1-4. * H. and A. ADAMS, Gen. Rec. 

 Moll., II, 1857, p. 504. * CLESSIX, Conch. Cab. Ano., 1874, p. 128, pi. xu, 

 figs. 1, 2. *P.ETEL, Conch. Sam., Ill, 1890, p. 184. 



* Margarita (Anodonta) sirionis LEA, Syn., 1838, p. 31. 



* Anodon sirionis CATLOW and KEEVE, Conch. Norn., 1845, p. 68. 



* Margaron (Anodonta) sirionis LEA, Syn., 1852, p. 51; 1870, p. 82. 



* Anodonta ftrrarisii D'ORBIGNY, Guer. Mag., 1835, p. 40. 



Kio de la Plata 



tGLABARIS PAZII Lea. 



* Anodonta pazli LEA, Pr. Ac. N. Sci. Phila., X, 1866, p. 35; * Jl. Ac. N. Sci. Phila., 



VI, 1868, p. 274, pi. xxxvi, fig. 87; *Obs., XII, 1869, pi. xxxvi, fig. 87. 



* CLESSIN, Conch. Cab. Ano., 1874, p. 139, pi. XLIII, figs. 3, 4. * P^ETEL, Conch. 

 Sam., Ill, 1890, p. 183. 



* Margaron (Anodonta) pazii LEA, Syn., 1870, p. 81. 



South America. 



tGLABARIS RUBICUNDUS Lea. 



* Anodonta rubicunda LEA, Pr. Ac. N. Sci. Phila., IV, 1860, p. 92; * Jl. Ac. N. Sci. 



Phila., V, 1863, p. 392, pi. XLVI, fig. 299; * Obs., X, 1863, p. 28, pi. XLVI, fig. 

 299. * CLESSIN, Conch. Cab. Ano., 1876, p. 106, pi. xxxn, figs. 5, 6. * P^ETEL, 

 Couch. Sam., Ill, 1890, p. 184. 

 * Anodon rublcundus SOWERBY, Conch. Icon., XVII, 1870, pi. xxx, fig. 118. 



* Margaron (Anodonta) rubicunda LEA, Syn., 1870, p. 75. 



Uruguay River, South America. 



t GLABARIS ROTUNDUS Spix. 



* Anodon rotundus SPIX, Test. Fluv. Bras., 1827, p. 28, pi. xx, figs. 2-4. 



* Anodon rotunda KUSTER, Conch. Cab. Ano., 1853, p. 33, pi. vm, fig. 1. 



* Margaron (Anodonta) rotunda LEA, Syn., 1870, p. 81. 



* Glabaris rotunda VON IHERING, Arch, fiir Nat., 1893, p. 59. 



* t Anodonta caiUiaudii LEA, Pr. Ac. N. Sci. Phila., IV, 1860, p. 308 ; * Jl. Ac. N. Sci. 



Phila., V, 1863, p. 395, pi. XLV, fig. 297 ; *Obs., X, 1863, p. 31, pi. XLV, fig. 297. 



* CLESSIN, Conch. Cab. Ano., 1873, p. 105, pi. xxxn, figs. 3, 4. * P.ETEL, 

 Conch. Sam., Ill, 1890, p. 177. 



* Anodon cailliaudi SOWERBY, Conch. Icon., XVII, 1867, pi. xu, fig. 38. 



* Margaron (Anodonta) caiUiaudii LEA, Syn., 1870, p. 81. 



Brazil. 



GLABARIS MEMBRANACEUS Maton. 1 



* Mytilus membranaceus MATON, Tr. Linn. Soc. Loud., 1811, p. 329, pi. xxiv, figs. 11, 



12. 



1 It is difficult to tell what this is, but I believe it to be some species of Glabaris, 

 from the fact that Maton says that the hinge is edentulous. The figure (11) plainly 

 shows it to be destitute of radial beak sculpture, though the umbo is perfect. The 

 specimens figured are evidently young. 



