626 PROCEEDINGS OF THE XATIO.\.II. MTSl.TM. 



Nouv. Syst., 1817, p. 107, pi. I, fig. 5. *DILLWYN, Cat., I, 1817, p. 317. 

 TURTOX, Conch. Diet., 1819, p. 116. * SHEPFARD, Tr. Linn. Soc. Lond.,XIII, 

 1820, p. 85, pi. v, fig. 5.* WOOD, Ind. Test., 1825, p. 58. pi. xn, fig. 33f. 



* HANLEY, Ipsa. Linn. Conch., 1855, pi. 487, pi. n, fig. 1. " WOOD, Ind. Test. 

 Rev., 1856, p. 69, pi. xn, fig. 33. 



Anodon anatlnns TURTOX, Conch. Ins. Brit., 1822, p. 240. *SOWERBY, Rec. and 

 Fos. Sh., XVII, 1823, fig. * FLKMING, Hist. Brit. Moll., 1828, p. 415. 



RKKVK, Conch. Syst,, 1,1841, p. 121, pi. xcr, figs. 1, 2. 



*Anodonta anatina DRAPARNAUD, Hist. Moll. Fr., 1806, p. 135, pi. xn, fig. 2. 

 *GAEIITXKR, Vers. Syst., 1813, p. 37. * MILLET, Moll. Maine et Loire, 1813, 

 p. 75. KLEKS, Desc. Test., 1818, p. 42.* LAMARCK, An. sans Vert., VI, 1819, 

 p. 85.' C. PFEIFFER, Deuts. L. und S. Moll., 1821, Pt. 1, p. 112, pi. vi, fig. 2. 



\ii.s.sox, Hist. Moll. Svec., 1822, p. 114. * Bosc, Hist. Nat. Coq., Ill, 1824, 

 1>. 143, pi. xxni, fig. 1.* WAARDENBERG, Com. Hist. N. An., 1827, p. 37. 

 STARK, Nat. Hist., II, 1828, p. 89. * KLEEBERG, Moll. Bor., 1828, p. 37. 



* ROSSMASSLER, Icon., V and VI, 1837, p. 57, pi. xxix, figs. 417-420. * PORRO, 

 Mai. Como., 1838, p. 109. * HANLEY, Test. Moll., 1842, p. 216; Biv. Shells, 

 1843, p. 216. * STABILE, Faun. Lug., 1845, p. 57, pi. n, fig. 67. *PUTON, 

 Moll. Vosg., 1847, p. 68. * GASSIES, Moll. Ag., 1849, p. 190.* MIDDENDORFF, 

 Sib. Reise, II, 1851, p. 283, pi. xxi, fig. 4; xxix, figs. 5, 6. * DROUET, Rev. 

 ct Mag., IV, 1852, p. 244; Nay. Fr., 1852, p. 4, pi. iv, fig. 1. * DUPUY, Hist. 

 Moll. Fr., 1852, p. 610, pi. xix, fig. 13." FRIELE, Norsk. L. Fersk. Moll., 1853, 

 p. 54.* VON WAHL, Suss. Biv. Liv., 1855, p. 122.* MOQUIN-TANDON, Moll. 

 Terr, et Fl. Fr., II, 1855, p. 558, pi. XLV, figs. 1, 2. "JEFFREYS, Brit. Conch., 

 I, 1862, p. 43. ' SCHRENCK, Reis. und Forsch. Am. L., II, 1867, p. 721. 

 BROT, Etude Nay. Lem., 1867, p. 38, pi. in, fig. 4; v, fig. 2; vi, figs. 1-3; vn, 

 figs. 1-3. * LEHMAN, Die Schneck., 1873, p. 303. * WESTKRLUND, Faun. S. N. 

 and D., 1873, p. 587." CLESSIX, Conch. Cab. Ano., 1876, p. 83, pi. xiv, figs. 3, 4 ; 

 xxvi, figs. 1, 2. *L. ADAMS, Coll. Man., 1884, p. 21, pi n, fig. 2. ' P/ETKL, 

 Conch. Sam., Ill, 1890, p. 176.* WESTERLUND, Faun. Pal., II, Pt. 7, 1890, 

 p. 225.* LOCARD, Coq. de Fr., 1893, p. 275. 



*. Inodon anatina CATLOW and REEVE, Conch. Noni., 1845, p. 66. 

 'nodonta complanata ROSSMASSLER, ' Icon., I, 1835, p. 112, pi. in, fig. 68, IV, p. 24, 

 pi. xx, fig. 283. SCIIOLZ, Schleis. L. und W. Moll., 1843, p. 123. * KUSTER, 

 Conch. Cab. Ano., 1853, p. 12, pi. ill, figs. 2, 3.* DROUET, Nay. Fr., 1854, p. 8, 

 pi. vn, fig. 1. * MOQUIN-TANDON, Moll. Terr, et Fluv. FT., II, 1855, p. 560, 

 pi. XLV, figs. 3,4. * VON WAHL, Arch.fiirNat. Kund. Liv.,2dser., I, p. 115. 

 WESTERLUND, Faun. S. N. & p., 1873, p. 586. *CLESSIN, Nach. Mai. Ges., 

 1874, p.85; 2 Deuts. Ex. Moll., 1876, p. 446, fig. 292. * KOBELT, Icon., VI, 1879, 

 p. 44, pi. CLXV, fig. 1650-1654.* DROUET, Mem. Ac. Dij., VII, 1882, p. 24 (re- 

 print)." WESTERLUND, Faun. Pal., II, Pt. 7, 1890, p. 301. * P.KTEL, Conch. 

 Sam., Ill, 1890, p. 178. 



* Anodon complanatns SOWERBY, Conch. Icon., XVII, 1867, pi. ix, fig. 21 



ANODONTA CYGNEA var. PONDEROSA C. Pfeiffer. 



*Anodonta ponder osa ('. I'FKIFFER, Deuts. L. und S. Moll., 1825, Pt. 2, p. 31, pi. iv, 

 figs. 1-6. * WAARDENBERG, Com. Hist. Nat. An., 1827, p. 37. *KLEEBKIU;, 

 Moll. Bor., 1828, p. 37.* ROSSMASSLER, Icon., IV, 1836, p. 24, pi. xx, fig. 282. 

 PORRO, Mai. Como., 1838, p. 112.* HANLF.Y, Biv. Shells, 1843,p. 216. SCHOL/., 



'Credited to Ziegler Museum by Rossmassler. It was published under the name 

 Anodonta compressa in Menke's Synopsis, 1831, but not described. 



2 According to Clessin in this paper this is the only European species distinct from 

 A. cygnea. 



