676 PROCEEDINGS OF THE NATIONAL MUSEUM. 



* Unio margariiifer Kuster, Conch. Cab., 1856, p. 130, pis. xxxviii, xxxix.— 



" Moquin-Tandon, Moll. Terr, et Fluv. Fr., 11, 1855, p. 566, pi. xlvii.— * NoR- 

 DENSKKiLD aiicl Nylander, Fiu. Moll., 1856, p. 86, pi. vi, Hg. 74.— " Drouet, 

 Naj'. Fr., II, 1857, p. .37, pi. i. — * Hkssling, Perl, unci Hire Perlen, 1859, p. 86, 

 pi. I.—* Jeffreys, Brit. Conch., 1, 1862, p. 37.—* Reeve, L. and F. VV. Moll. 

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



* Unio {Margaritann) margariiifer Schrenck, Reis. unci F. im Amnr-Lande, II, 



1867? p. 700. 



* Unio auricularius Spengler, Skriv. Nat. Selsk., Ill, 1793, p. 44. 



* Unio elongata Lamarck, Ann. sans Vert,, VI, 1819, p. 70.'— Stark, Nat. Hist., 11^ 



1828, p. 90.— Gras, Moll. Isere Ap., 1840, p. 22.— Puton, Moll. Vosges., 1847, 

 p. 72. 



* Damaris elomjata Leach, Syn. Moll. Gt. Brit., 1852, p. 322. 



* Margaritana elongata Westkrlund, Faun. Pal., II, Pt. 7, 1890, p. 185.— ' LOCARD, 



Coq. de Fr., 1893, p. 149, fig. 162. 



* Z7mo elongatus 'Nii.ssoN, Hist. Moll. Svec, 1822, p. 106.— * Sowerby, Couch. 



Icon., XVI, 1868, pi. Lxxvi, fig. 397.—* PyETEL, Conch. Sam., Ill, 1890, p. 151. 



* Alasmodonta arcuata Barnes, Am. .11. Sci., VI, 1823, p. 277, pi. xii, 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, und Ihre Perlen, 1859, 

 p. 205. 



* Mya arcuata Eaton, 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.—* Mighels, Bost. .11. N. Hist., 1844, 

 p. 325. 

 "" Margaritana arcuata Stiupson , Shells of N.Eng., 1851, p. 15.—* Kuster, Conch. 

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

 1853, p. 262.— ''Gould, Inv. of Mass., 1870, p. 174, fig. 477.— *PvEtel, Conch. 

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



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



pi. vn, fig. 4. 

 ''Unio roissyi Michaud, Comp. Hist. Moll., Fr., 1831, p. 112, pi. xvi, fig. 28.— 

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



* Margaritana roissyi \yKSTERLUi>(T>, Faun. Pal., II, Pt. 7, 1890, p. 186. — *Locard, 



Coq de France, 1893, p. 150. 

 *Unio tristis Morelet, Moll. Portugal, 1845, p. 107, pi. xiii, fig. 2. 2 



* Margarita (Unio) crassissimus Lea, Syn., 1836, p. 40; 1838, p. 26." 



* Unio {Alasmodonta) dahnricus Middendorff, Bull. Phys. Math. Ac. St. Petersb., 



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



* Unio dahuricus Middendorff, 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. Anuir-Lande, II, 1867, 



p. 699. 

 "■Margaritana dahurica Kobelt, Abh. Senck, Nat. Ges., XI, 1875, p. 427.—* Kobelt, 



Faun. ,Jap. Ext., 1879, p. 143, pi. xiii, figs. 1, 2.—* Middendorff, Kong. 



Svensk. Vetens. Ak. Handl., XIV, No. 12, p. 110.— Pjstel, Conch. Sam., Ill, 



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



1 Lamarck thinks this may be the Mya margariiifer a of Linnivus; Lea is certain 

 thut it is. 



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

 that his shell was probaly a young margaritifera. 



•'The naked name crassissima was first applied to this by Klein, Methodi Ostraco- 

 logicae, 1753, p. 128, pi. x. 



