ANODONTITES I429 



Clabaris irapesialis Pii.srry. Pr. Ac. N. Sci. Phila.. 1896. p. 



563. — Simpson, Syn., 1900, p. 923. 

 Anodonta trapesialis Blainvili^e, Man. de Mai. et Conch., 



1825, p. 538, iig. .J. — Deshayes, Enc. Meth., II, 1827. p. 



147, pi. ccv, fig. I. — Wyatt, Man. Conch., 1838, p. 68, pi. 



XI, fig. 3. — KusTER, Conch. Cab. Ano., 1853, p. 31, pi. vii, 



fig. 4. — Cr.ESSiN, Conch. Cab. Ano.. 1876, p. 235, pi. lxxvii, 



fig- 5- 

 Anodon trapezialis Crouch, 111. Int. Lam., 1827, p. 16, pi. ix, 



fig- 7- 

 Margarita (Anodonta) trapccialis Lea, Syn., 1836, p. 53: 1838, 



P- 31- 

 Margarnn (Anodonta) trapc.cialis Lea, Syn., 1852, p. 52; 1870, 



p. 82. 

 Colnmha trapedalis P^t^tet., Conch. Sam., Ill, 1890. p. 188. 

 Anodon giganfeus Sptx (part). Test. Fhiv. Bras., 1827. p. 27, 



pi. XIX, fig. 2. 

 Anodon gigantea Sowerb'*', Conch. Icon.. XVTT. 1867, pi. viii, 



fig. 18.^ ' 

 Anodonta gigantea von Martens, Tvlal. Bl. XV, 1868, p. 196. 

 Colnmha gigantea P^.tee, Conch. Sam., Ill, 1890, p. 188. 

 ? Anodon penicillatus Gra.y, Pr. Zool. Soc. Lond., 1834. p. 57. 

 Anodonta penicillata H. and A. Adams, Gen. Rec. Moll. II, 



^857, p. 503- 

 Anodon snsannce Gray in Griffith, Cuv., XII, 1834, pi. xxiv, 



fig. I. — Sowerby', Conch. Icon., XVII, 1867, pi. ix, fig. 21. 

 Anodonta susannce P.t:tet., Conch. Sam., Ill, 1890, p. 185. 

 Anodon ciconia Gould, Pr. Bost. Soc. Nat. Hist., IV, 1851, p. 



92. 

 Anodon blaini'iUeana Soavertiy, Conch. Icon., X\'IL 1867, pi. 



VI, fig. 2. 



A fine, abundant, widely distributed and very variable spe- 

 cies. The figure in the Encyclopedic Methodique is from a 

 shell with evenh' rounded lines, the posterior end being rather 

 squarely truncate above and widely rounded below. The base 

 shows no traces of angulation behind the middle. The anterior 

 base of the shell usually gapes v.-idelv and there is a slight gape 

 at the edge of the dorsal slope. 



