676 PROCEEDINGS OF THE NATIONAL MUSEUM. 



* Unio margaritifir KTSTKK, Conch. Cab., 1856, p. 130, pis. xxxviu, xxxix. 



* MOQUIN-TANDON, Moll. Terr, et Fluv. Fr., II, 1855, p. 56(3, pi. xi.vn. * NOR- 

 DEXSKIOLD and NYLANDEU, Fiu. Moll., 1856, p. 86, pi. vi, h'g. 74. "DROUET, 

 Nay. Fr., II, 1857, p. 57, pi. i. * HESSLING, Perl, untl Hire Perlon, 1859, p. 86, 

 pi. i.* JEFFREYS, Brit. Couch., I, 1862, p. 37.* RKKVE, L. and F. \V. Moll. 

 Brit,, 1863, p. 223, fig. 3. *L. ADAMS, Coll. Man., 1884, p. 19, pi. i, fig. 12. 



1'nio (Martjaritami) margaritifer SCHRENCK, Reis. uiul F. im Amur-Lande, II, 



1867? p. 700. 

 I'nio aiir'n-itlnrinx SI>EN<;LER, Skriv. Nat. Selsk., Ill, 1793. p. 44. 



* Unio elongala LAMARCK, Ann. sans Vert., VI, 1819, p. 70.' STARK, Nat. Hist., II ( 



1828, p. 90. GRAS, Moll. Isere Ap., 1840, p. 22. PUTON, Moll. Vosges., 1847, 



p. 72. 



l>amari eloinjata LEACH, Syu. Moll. (it. Brit., 1852, p. 322. 

 Mttrijdrltanti ciongata WKSTERLUND, Faun. Pal., II, Pt. 7, 1890, p. 185. " LOCARD, 



( 'oq. de Fr., 1893, p. 149, fig. 162. 



* Unio eloiigatns NILSSON, Hist. Moll. Svec., 1822, p. 106. * SOWERIJY, Conch. 



Icon., XVI, 1868, pi. LXXVI, fig. 397.* P.KTKL, Conch. Sain., Ill, 1890, p. 151. 



* Alasmodonta arcuata BARNES, Am. Jl. Sci., VI, 1823, p. 277, pi. xn, fig. 20.* C. B. 



ADAMS, Thompson's Hist, of Vermont, 1842, p. 165, figured; ' F. W. and L. S. 

 ofVt., 1842, p. 165, figured. * HESSLING, Die. Perl, and Ihre Perlen, 1859, 

 p. 205. 

 " My a arcuata KATOX, Zool. Text Book, 1826, p. 222. 



* Alasmodon arcuata GOULD, Inv. of Mass., 1841, p. 113, fig. 75. * DE KAY, Zool. of 



N. Y., Pt. 5, 1843, p. 197, pi. xiv, fig. 224.* MIGUELS, Bost. Jl. N. Hist., 1844, 

 p. 325. 



Mtiri/tiritaiui aranala STIMI-SON, Shells of N. Kng., 1851, p. 15. ' KUSTER, Conch. 

 Cab., 1856, p. 293, pi. xxxix, fig. 1. * CONRAD, Pr.Ac. Nat. Sci. Phila.., VI, 

 1853, p. 262. v GOULD, Inv. of Mass., 1870, p. 174, tig. 477. *P.KTEL, Couch. 

 Sam., Ill, 1890, p. 172. *H. CARPENTER, Naut., IV, 1890, p. 35. 



* Unio xinuata C. PFEIFFER, Nat. Deutsch. L. und S. W. Moll., Pt. 2, 1825, p. 33, 



pi. vn, fig. 4. 

 / nio roissyi MICHAUD, Comp. Hist. Moll., Fr., 1831, p. 112, pi. xvi, fig. 28. 



* GRAS, Moll. Isere Ap., 1840, p. 22. 



* Margaritana roissyi WESTERLUND, Faun. Pal., II, Pt. 7, 1890, p. 186. * LOCARD, 



Coq de France, 1893, p. 150. 

 *Unio tristis MORELET, Moll. Portugal, 1845, p. 107, pi. xm, fig. 2.- 



* Margarita (Unio) crassisslmtis LEA, Syu., 1836, p. 40; 1838, p. 26. 3 



*Unio (Alasmodonta) dahuriciis MIDDENDORKF, Bull. Phys. Math. Ac. St. Petersb., 

 IX, 1850, p.?; * Sib. Reise, II, 1851, p. 275, pi. xxvi, figs, 3-5. 



"f/wiorfa/iKricHsMiDDENDORFF, L. and S. Moll. Sib., 1859, p 26. * HESSLING, Perl, 

 und Ihre Perlen, 1859, p. 202. * WESTERLUND, Kong. Sv. Vet. Ak. Hand., 

 XIV, No. 12, p. 74. 



* Unio (Margaritana) dahuricus SCHRENCK, Reis. und Forsh. Amur-Lande, II, 1867, 



p. 699. 



* Margaritana dahurica KOBELT, Abh. Senck, Nat. Ges., XI, 1875, p. 427. * KOBELT, 

 Faun. Jap. Ext., 1879, p. 143, pi. xm, tigs. 1, 2. * MIDDENDORFF, Kong. 

 Svensk. Vetens. Ak. Handl., XIV, No. 12, p. 110. P/ETEL, Conch. Sam., Ill, 

 1890, p. 173. * WESTERLUND, Faun. Pal., II, Pt. 7, 1890, p, 187. 



'Lamarck thinks this may be the Mya margaritifera of Linnauis; Lea is certain 

 that it is. 



2 The figure looks like an elongated batarus, but Morelet afterwards acknowledged 

 that his shell was probaly a young margaritifera. 



3 The naked name crassissima was first applied to this by Klein, Method! Ostraco- 

 logica-, 1753, p. 128, pi. x. 



