NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 923 



GLABARIS MONTEZUMA Lea.' 



*Anodonta montesama Lea, Pr. Am. Phil. Soc, II, 1841, p. 31; *Tr. Am. Phil. Soc, 

 1842, p. 240, pi. XXIII, fig. 55 ; ^Ob8.,III, 1842, p. 78, pi. xxiii, fig. 55.— ^ H. and 

 A. Adams, Geu. Rec. Moll., II, 1857, p. 504. — "" Clessin, Conch. Cab. Ano., 

 1876, p. 220, pi. Lxxii, figs. 7, 8.—* B. H. Wright, Check List, 1888.—* P.etel, 

 Conch. Sam., Ill, 1890, p. 182. 



^ Mar gar OH {Anodovta) montezuma Lea, Syn., 1852, p. 51; 1870, p. 82. 



Central America. 



(Group of Oldbaris trapesialis.) 



Shell large, inflated, elliptical, narrower in front, with full, rather 

 prominent beaks, a slight wing on the post dorsal part, and sometimes 

 a small one in front of the beaks; epidermis smooth, generally uniform 

 olive green; hinge line straight or slightly sinuous; escutcheon large 

 and conspicuous; nacre bluish silvery, sometimes marked with parallel, 

 wavy, dark lines. 



Animal with the marsupium filling the inner branchiae; gills large, 

 inner the larger ; palpi very large, reniform ; mantle thin, with a wide, 

 thickened edge; branchial opening small, plicate, but not crenulate or 

 papillose; anal opening large, smooth, separated from the branchial by 

 a strong bridge. 



t GLABARIS TRAPESIALIS Lamarck. 



*Anodonta trapesialis Lamarck, An. sans. Vert., VI, 1819, p. 87. 

 ^Jridiiia trapesialis d'Orbigny, Guer. Mag., 1835, p. 43-. 



* Glaharis trapesialis Pilsby, Pr. Ac. N. Sci. Phila., 1896, p. 563. 



* Anodonta trapezialis Blainville, Man. de Mai. et Conch., 1825, p. 538, fig. 1. — 



*Deshayes, Enc. Meth., II, 1827, p. 147, pi. CGV, fig. 1.— *Wyatt, Man. 



Conch., 1838, p. 68, pi. xi, fig. 3.—* Hanley, Test. Moll., 1842, p. 220; * Biv. 



Shells, 1843, p. 220.—* Kuster, Conch. Cah. Ano., 1853, p. 31, pi. vii, fig. 4.— 



*H. and A. Adams, Gen. Eec. Moll., II, 1857, p. 504. — ""Clessin, Conch Cab. 



Ano., 1876, p. 235, pL lxxvii, fig. 5. 

 ^ Anodon trapezialis CROUCH, 111. Int. Lam., 1827, p. 16, pi. ix, fig. 7. — * Catlow 



and Eeeve, Conch. Nom., 1845, p. 68. 

 '^Margarita (Anodonta) trapezialis Lea, Syn., 1836, p. 53; 1838, p. 31. 



* Margaron {Anodonta) trapezialis Lea, Syn., 1852, p. 52; 1870, p. 82. 



* Columha trapezialis PiEXEL, Conch. Sam., Ill, 1890, p. 188. 



* Anodon giganteus Spix (part). Test. Fluv. Bras., 1827, p. 27, pi. xix, fig. 2. 



* Anodon giganiea Sowerby, Conch. Icon., XVII, 1867, jil. viii, fig. 18. 



* Anodonta gig aniea von Martens, Mai. BL, XV, 1868, p. 196. 



* Columha giganiea P.etel, Conch. Sam., Ill, 1890, p. 188. 



* 'i Anodon penicillatus Gray,'' Pr. Zool. Soc. Lond., 1834, p. 57. — *M5ller, Syn. 

 Nov. Gen., 1836, p. 195. 



^ I have never seen this shell, and can not be positive from the figure and descrip- 

 tion "whether it is a Glaharis or an Anodonta. I incline to think it the former, and 

 that it belongs in this group. 



'^ = Anodontites trapesialis Lamarck according to d'Orbigny in above, but in Voy. 

 Am. Mer. he says it is not that. 



3 1 have never seen this shell. Dr. Lea believes it to -= trapesialis Lamarck. 



