INVERTEBRATE PALAEONTOLOGY. 511 



DIMYAEIA. 



UNIONID^E. 



Genus UNIO, Retzius. 



Synon.— Unio, Retzius (1788), Diss. Phys., 16.— Brng. (1792), Jour. Hist. Nat., I; and Encyc. M6tb., tab., 

 247.— Cuvior (1798), Tab. EhSiu., 425.— Lamarck (1801), Syst., 114 (not Prodr., 1799).— 

 Say (1816), Art. Concb. iu Nicbolson's Encyc, 1st Am. ed. ; and (1818 and 1819) in sub- 

 sequent editions of same ; also (1822) Jour. Acad. Nat. Sci. Pbilad., II, part 2; (1824) 

 in Report of Long's Expedition, II, 265; and (1830 to 1834) Am. Concb., parts 1 to 7. — 

 Lea (1827 to 1874), Observations ou tbe Genus Unto, I to XIII, 4to ; and (1836 to 1870) 

 Synop. Fan). Unionida: ; also in numerous smaller papers in Proceed. Acad. Nat Sci. 

 Pbilad., at various dates.— Conrad (1834), Am. Jour. Sci., XXV, 338; and (1835 to 

 1843) Monogr. Fam. Naiades N. Am., &c., <fec. 

 Proplera, Raf. (1819), Jour. Phys., LXXXVIII, 426 (as a subgenus under Unto). 

 Eurynia, Raf. (1819), ib. (as a subgenus under Unio). — Agassiz (1851), Stimpsou's Shells of New- 

 England, 13 (as a geuus). 

 EUipto, Raf. (1819), Jour. Phys., LXXXVIII, 426 (as a subgenus under Unio). 

 Plagiola, Raf. (1819), ib. (as a subgeuus under Unio). — Agassiz (1852), Arch. f. Nat., XVIII, 46 



(as a genus). 

 Obovaria, Raf. (1819), Jour. Physics, LXXXVIII, 426 (as a subgenus under Unio). — Agassiz (1852), 

 Arch. f. Nat, XVIII, 46 (as a genus). — H. and A. Adams (1857), Genera Recent Moll., 

 II, 492 (as a subgenus uuder Unio). . 

 Truncilla, Raf. (1819), Jour. Physics, LXXXVIII, 427 (as a subgenus uuder Unio). — Agassiz 



(1852), Arch. f. Nat., XVIII, 44 (as a genus). 

 Amblema, Raf. (1819), Jour. Phys., LXXXVIII, 427 (as a subgenus under Unio). 

 Pleurobema, Raf. (1819), ib.— Agassiz (1852), Arcb. f. Nat., XVIII, 49 (as a genus). 

 Scalenaria, Raf. (1820), Aun. Gen. Sci. Phys. Bruxelles, 309 (as a subgenus under Obliquaria). 

 Lcptodea, Raf. (1820), ib., 295 (as a subgenus under Unio). 

 Aximcdia, Raf. (1820), ib., 297 (as a subgenus uuder Unio). 

 Lampsilis, Raf. (1820), ib., 298 (as a genus).— Agassiz (1852), Arcb. f. Nat., XVIII, 44 (as a genus).— 



H. and A. Adams (1857), Genera Recent Moll., II, 495 (as a subgeuus under Unio). 

 Metaptera, Raf. (1820\ Ann. Gen. Sci. Phys. Bruxelles, 299.— Agassiz (1851), iu Stimpsou's Shells 

 New England, 14; and (1852) Arcb. f. Nat., XVIII, 45 (as a genus).— Conrad (1853), 

 Proceed. Acad. Nat. Sci. Philad., VI, 260 (as a genus).— 11. and A. Adams (1857), Genera 

 Recent Moll., II, 498 (as.a subgenus under Unio). 

 Truncilla, Raf. (1820), Ann. Gen. Sci. Pbys., 300 (as a genus). 



Obliquaria, Raf. (1820), ib., 301.— H. and A. Adams (1857), Genera Recent Moll., II, 497. 

 Ellipsaria, Raf. (1820), Anu. Sci. Phys., 303 (as a genus). 



Quadmla, Raf. (1820), ib., 305 (as a subgeuus under Obliquaria). — Agassiz (1852), Arcb. f. Nat., 

 XVIII, 48 (as a genus).— H. and A. Adams (1857), Genera Recent Moll., II, 497 (as a 

 subgenus under Unio). 

 Botundaria, Raf. '(1820), Ann. Sci. Phys. Bruxelles, 308 (as a subgeuus under Obliquaria). — Agassiz 



(1852), Arch. f. Nat., XVIII, 48 (as a genus). 

 Sintoxia, Raf. (1820), Anu. Sci. Pbys. Bruxelles, 310 (as a subgeuus under Obliquaria). 

 Epiloblasma, Raf. (1820), Monogr. Bivalves Ohio River, 2 (as a genus). 

 Toiolasma, Raf. (1820), ib. (as a genus). 

 Bariosta, Raf. (1820), ib. (as a geuus). — H. and A. Adams (1857), Genera Recent Moll., II, 491 



(as a subgenus under Unio). 

 Mysca, Turton (1822), British Bivalves, 244. 

 Diplodon, Spix (1827), Test. Brasil., 26-28.— H. and A. Adams (1857), Genera Recent Moll., II, 497 



(as a subgenus under Unio). 

 yiaia, Swainson (1337).— H. and A. Adams (1857), Genera Recent Moll., II, 496. 

 Margarita (part), Lea (1838),Traus. Am. Phil. Soc, VI (not Leach and others). 

 Crenodonta, Schliit. (1838), Verz., 33. 

 Lymnadia, Theliderma, Cunicula, Legumia, and Polamida, Swainson (1340;, Malac., 265 to 378. 



