652 UNIO 
Atlantic drainage from the St. Lawrence to Georgia; west 
in the British possessions to Manitoba? 
Type locality, Maryland and New Jersey. 
Mya complanata SOLANDER, manuscript (no date).—DILLwyn, 
Cat.) re rgepe Sil 
Unio complanata Dresuayes, An. sans Vert., 2d ed., VI, 1835, 
P. 559. 
Unio complanatus Gouup, Inv. of Mass., 1841, p. 107, figs. 68- 
70.—BInnNkEY, 2d ed., Inv. of Mass., 1870, p. 167, fig. 472.— 
Hantey, Biv. Shells, 1843, p. 199, pl. xx1, fig. 20.—DeE Kay, 
Zool. of N. Y., Pt. 5, 1843, p. 188, pl. xx, fig. 246.—Kus- 
TER, Conch. Cab. Unio, 1856, p. 137, pl. x11, fig. 2—Hart- 
MAN and MicHENeErR, Conch. Cest., 1874, p. 86, fig. 187.— 
SIMPSON, Syn., 1900, p. 720. 
Margarita (Unio) complanatus laa, Syn., 1836, p. 30; 1838, 
p: 22. 
Margaron (Unio) complanatus Lea, Syn., 1852, p. 32; 1870, 
Dp. sik 
Elliptio complanatus OR?MANN, Ann. Car. Mus., VIII, 1912, p. 
260. 
? Unio violaceus SPENGLER, Skriv. Nat. Selsk. III, 1793, p. 55. 
Unio purpureus Say, Nich. Enc., IH, 1817, pl. 1, fig. 1—Sow- 
mRBY, Conch. Icon, XIV, 1868, pl. Lxvitt, fig. 346. 
Mya purpurea Eaton, Zool. Text-Book, 1826, p. 2. 
? Unio purpurea Desuayers, Encyc. Meth. II, 1827, p. 151, pl. 
249, fig. 5. 
Unio rarisulcata LAMARCK, An. sans Vert., VI, 1810, p. 72. 
Unio coarctata LAMARCK, An. sans Vert., VI, 1819, p. 73-— 
? Sowersy, Conch. Icon., XVI, 1866, pl. xxxiv, fig. 178. 
Unio purpurascens I,AMARCK, An. sans Vert., VI, 1819, p. 73. 
Unio georgina I,AMaRcK, An. sans Vert., VI, 1819, p. 74. 
Unio rhombula L.aMarcx, An. sans Vert., VI, 1819, p.-74.— 
? DELESSERT, Rec. Cog. Lam., 1841, pl. xu, fig. 8. 
Unio carinifera LAmMarcK, An. sans Vert., VI, 1819, p. 74.— 
Kuster; Conch: (Cab.. Unio; 1861, p.i76.4p bavi. tien. 
Unio glabrata LAMARCK, An. sans Vert., VI, 1819, p. 75. 
