UNIO 569 
impressed; posterior scars superficial; nacre bluish-white, 
white or flesh-tinted, a little iridescent behind, thickened in 
front. 
Length 76, height 36, diam. 29 mm. 
Length 7o, height 38, diam. 24 mm. 
Length 58, height 30, diam. 20 mm. 
Europe; Asia Minor; Northwest Africa. 
?Mya pictorum GMELIN, Syst. Nat., 13th ed., 1788, p. 3218.— 
Donovan, Brit. Shells, V, 1803, pl. cLxxiv.—?CHENU, Bib. 
Conch., 1st. ser., I, 1845, p. 114, pl. xLvit, figs. 8, 9. 
Umo pictorum DRAPARNAUD, part, Hist. Moll. Fr., 1806, p. 131. 
pl. x1, figs. 1-4. 
?Unmio musivus SPENGLER, Skriv. Selsk., III, 1793, p. 67.— 
Haas, Beil. z. Nachtr. D. Mal. Ges., No. 4, p. 62. 
Unio crassus musivus ORTMANN, Ann. Car. Mus., VIII, 1912, 
Pp. 275. ; 
Unio musicus SIMPSON, Syn., 1900, p. 744. 
Mya batava Maton and Racuevt, Tr. Linn. Soc. Lond., VIII, 
1807, p. 37-—Woop, Gen. Conch., I, 1815, p. 303, pl. x1x, 
Aen Aa end lest. 18255) p.: 12; -pl. 11, fie: 25D) meve-ed., 
POGOs asloe Dis tty fos es. 
Unio batava LAMARCK, An. sans Vert., VI, 1819, p. 78.—C. 
PFEIFFER, Nat. L. and Suss. Moll., Pt. 1, 1821, p.. 119, pl: 
v, fig. 14—DesHaAyes, Enc. Meth., II, 1827, p. .151, pl. 
Sexi to LTS sO.8p. So4.cpi CCXLVILI, fig: 3. 
Mysca batava Turron, Man. L. and F. W. Shells, Brit. Is., 
Las bep. Ks TO. 
Unio batavus Nitsson, Hist. Moll. Svec., 1822, p. 112.—Ross- 
MASSLER, Icon., II, 1835, p. 20, pl. vit, figs. 128, 128a, 128); 
Ti, 1536, pp. 28, 32; pl. xiv. He. 205); xv, fir. 214; V and 
Wi e1837.7p, 50,upl. xxi ps 4a; XI, 1842, p. 14; pl. tv, 
fig. 745.—Brown, L. and F. W. Conch., 1836, p. 111, pls. 
XV, figs. 6-8; xxt, figs. 10, 11; Ill. Recent Conch., 1844, p. 
82, pl. xxxt, figs. 3, 3a, 4-6.—Dupuy, Hist. Moll. Fr., 1852, 
p. 638, pl. xxv, figs. 14, 15.—Kustrer, Conch. Cab. Unio, 
1854, p. 121, pl. xxxi1t, figs. 4-7; XXXIV, figs. 1,2——MoguIn- 
TANpon, Moll. Terr. et Fluv. Fr., IJ, 1855; Pp. S71, plisehs 
