UNIO 573 
Unio capigliolo KustEr, part, Conch. Cab. Unio, 1854, p. 125, 
pl. xxxwv, figs. 5, 6.—Sowersy, Conch. Icon., XVI, 1868, 
pl. Lxxv, fig. 392——Dupuy, Hist. Moll. Fr., 1852, p. 645, 
pl. xxv, fig. 10. 
Umio heldi Kuster, Conch. Cab. Unio, 1854, p. 111, pl. xxx, 
figs. 5-7. 
Unio luxurians Kuster, Conch. Cab. Unio, 1854, p. 119, pl. 
MCL, fier? 5. 
Unio brevirostris Kuster, Conch. Cab. Unio, 1854, p. 120, pl. 
WK RUE. Hos.) 1-3. 
Unio natolicus Kuster, Conch. Cab. Unio, 1856, p. 144, pl. 
XL, ro A. 
Unio turcicus Kuster, Conch. Cab. Unio, 1862, p. 267, pl. xc, 
figs. 3, 4. 
Unio merdiger Rrerve, Conch. Icon., XVI, 1865, pl. xxvii, 
fig. 145. 
Var. requieni Rossmassler. 
Shell small, rather solid, subrhomboid, considerably inflated. 
Length 45, height, 24, diam. 19 mm. 
Umo requient RossMASSLER, Icon., XII, 1844, p. 29, pl. Lvu, 
figs. 757-761.—Kustrr, part, Conch. Cab. Unio, 1856, p. 126, 
pl. xxxvi, fig. 2—Mogu1n-Tanpon, Moll. Terr. et Fluv. 
Bre, We 5855, 574.. pl. i, fies: 5-7._Khosent, Icon, VE, 
1670. p. 43, pl. CLxIIt, fio: 1647. 
Unio nanus Duruy, Hist. Moll. Fr., 1852, p. 640, pl. xxv, fig. 
16.—Kosett, Icon., VI, 1879, p. 42, pl. cLxt, figs. 1642, 
1643.—Locarp, Coq. de Fr., 1893, p. 154, fig. 168. 
Rossmassler figures a number of forms of batavus under 
the name requieni. One of these is a small variety that may 
bear the above name. The Unio nanus of Dupuy seems to 
equal it but, according to Dr. Lea, the original Unio nana of 
Lamarck is a small variety of littoralis. 
Maton and Rackett do not figure their species, but refer to 
several figures. The first is in Ginanni, Opere Postume, 1755, 
pl. 1v, fig. 17. This work I have not seen. The figures referred 
to in Schréter’s Flussconchylien, in Chemnitz, and the Ency- 
