622 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



p. 100,— * Drouet, Nay. Fr., 1852, p. 5, pi. i; *Rev. et Mag., IV, 1852, p. 55.— 



* DupuY, Hist. Moll. Fr., 1852, p. 601, pi. xv, fig. 14.—* FonBES and Hanley, 

 Hist. Brit. Moll., II, 1853, p. 155, pi. xxxix, fig. 3; xl, figs. 2, 3; xli.— trus- 

 ter, Conch. Cab. Ano., 1853, p. 58, pi. xv. — VoN Wahl, Arch, flir Natur K. 

 Liv., 2dser., I, 1855, p. 133.— ^Moquin-Tandon, Moll. Fr., II, 1855, p. 557, 

 pi. XLiv. — *voN Wahl, Suss. Biv. Liv., 1855, p. 133. — * Nordenskiold and 

 Nylander, Fin. Moll., 1856, p. 90, pi. vii, fig. 78. — H. and A. Adams, Gen. Eec. 

 Moll., II, 1857, p. 502; III, pi. cxviii, figs. 1, la, 1&.— * Chenu, Man., 1859, II, 

 p. 145, fig. 718.—* Sowerby, 111. Index Brit. Shells, 1859, pi. vii. No. 4.— 

 Reeve, Elements of Conch., II, 1860, pi. p. No. 4. — * Jeffreys, Brit. Conch., 

 1, 1862, p. 41.—' Reeve, L. and F. W. Moll. Br., 1863, p. 215, fig. 1.— *Bielz, 

 Faun. Sieben, 1863, p. 195.— * Houghton, Int. Obs.,-1864, p. 68, pi. [i], figs. 

 1, 2. — * Brot, Etudes Nayades, Leman, 1867, p. 28, pi. i, fig.l ; pi. ii, figs. 1, 2.— 



* KoBELT, Faun. Nass. Moll. , 1871, p. 247. — * Westerlund, Faun. S. N. and D,, 

 1873, p. 583.— Drouet, Mem. Acad. Dijon, VIII, 1882, p. 25 (reprint).— 'L. 

 Adams, Coll. Manual, 1884, p. 21, pi. ii, fig. 1. — *P^tel, Conch. Sam., Ill, 

 1890, p. 178.— * Westerlund, Faun. Pal., II, Pt. 7, 1890, p. 199.— *Locard, 

 Coq. de Fr., 1893, p. 234.— * Westerlund, Act. Soc. F. and F. F., XIII, No. 7, 

 1897, p. 168. 



Sympliynota cygnea Lea, Tr. Am. Phil. Soc. 1830, p. 456; Obs., I, 1834, p. 70. 



* Margarita (Anodonta) cygnea Lea, Syn., 1836, p. 48; 1838, p. 29. 



*Anodon cygnea Crouch, 111. Int. Lam., 1827, pi. ix, fig. 6. Catlow and Reeve, 



Conch. Nom., 1845, p. 66. 

 *Margaron (Anodonta) cygnea Lea, Syn., 1852, p. 47; 1870, p. 76. 

 "Anodonta cygnoea Gasseis, Moll. Ag., 1849, p. 189, 

 ^Anodonta radiatus Mi'ller, Vermium, 1774, p. 209. 

 *Mytilus zellensis Gmelin, Syst. Nat., 13th ed., T, 1788, p. 3262. 



* Anodonta zellensis Waardenberg, Hist. Nat. Animalium, 1827, p. 37. 



* Anodonta cellensis C. Pfeiffer, Dents. L, and Suss. Moll., I, 1821, p. 110, pi. vi, 



fig. 1. — *Bosc, Hist. Nat. Coq., Ill, 1824, p. 144.— *Rossmassler, Icon., IV, 

 1836, p. 22, pi. XIX, fig. 280.—* Scholz, Schleis. L. and W. Moll., 1843, p. 119.— 



* Stabile, Faun. Lug., 1845, p. 58, pi. n, fig. 69. — * Troschel, Arch, fiir Nat., 

 XTII, Pt. 1, 1847, p. 272.— *Des Moulins, Actes. Soc. L. Bord, XVIII, 1852, 

 p. 495.—* Drouet, Rev. et Mag., IV, 1852, p. 60.—* Dupuy, Nay. Fr. No. 2, 1852, 

 p. 11, pi. H.- *KuSTER, Conch, Cab. Ano., 1853, p. 16, pi. iv, fig. 3 ; v,figs. 1-4 ; vi, 

 fig. 1. — * BiELZ, Faun. Sieben., 1863, p. 197. — *Brot, Coq. Leman, 1867, p. 33, 

 pi. Ill, figs. 1-3; IV, figs. 1, 2; vi, fig. 4. — *Schrenck, Reis. uud F. Am. L., 

 II, 1867, p. 722.—* KoBELT, Faun. Nass. Moll., 1871, p. 251.—* Lehman, Die 

 Schneck., 1873, p. 297.— *P^tel, Conch. Sam., Ill, 1890, p. 177.— *Wester- 

 LUND, Faun. Pal., II, Pt. 7, 1890, p. 211. 



* Anodonta variahilis Draparnaud, Tab. Moll. Fr., 1801, p. 108. — Fournel, Faun. 



Moselle, I, 1836, p. 487. 



* My tilus avonensis MONTAGV, Test. Brit., 1803, p. 172.— *Turton, Conch. Diet., 



1819, p. 116.— * Wood, Ind. Test. Rev., 1856, p. 69, pi. xii, fig. 34. 



* Anodon avonensis, Turton, Conch. Ins. Brit., 1822, p. 211. 



* Anodonta avonensis Moquin-Tandon, Moll. France, II, 1855, p. 562, pi. xlvi, 



figs. 7, 8. 



* My lilus avoensis TvTiTON,BTit. Faun., 1807, J). 165. 



* Mytilus stagnalis Turton, Brit. Faun., 18^7, p. 165. — * Dillwyn, Cat. I, 1817, p. 



316.— Turton, Conch. Diet., 1819, p. 115. 



* Anodonta stagnalis Bosc, Hist. Nat. Coq., Ill, 1824, p. 143.—* WesTjSRLund, Faun. 



Pal., II, Pt. 7, 1890, p. 199.—* Locard, Coq. Fr., 1893, p. 228. 



* Mytilus fucatus Dillwyn, Cat. 1, 1817, p. 317. 



* Anodonta sulcata Lamarck, An. sans Vert., VI, 1819, p. 85. — *Nilsson, Hist. Moll. 



Svec, 1822, p. 113.—* Deshayes, Enc. Meth., II, 1827, p. 147, pi. ecu.—* Klee- 



