564 UNIO 
Unio orphaensis Lea, Pr. Acad. Nat. Sci. Phila.; VII, 1864, 
p. 285; Jl. Acad. Nat. Sci. Phila, Wi. 1868, p. 250, pl xox. 
fig. 64; Obs. XII, 1869, p. 10, pl. xx1x, fig. 64—KoBEI,7, 
Icon., new ed., XVIII. 1912, p..52; plo pvt, figs: 2067, 2603: 
Margaron (Unio) orphaensis Lea, Syn., 1870, p. 52. 
Unio orfaensis Kose, Icon., new ed., XIX, 1912, p. 37, pl. 
DXXX, figs. 2734, 2735. 
Unio (orfaensis var.?) ehrmanni Koper, Icon., new ed., XIX, 
1912, p. 38, pl. Dxxx, fig. 2736. 
Unio mardinensis LEA, Pr. Acad. Nat. Sci. Phila., VIII, 1864, 
p.-286; Jl. Acad. Nat. Sei. Phila. : Vij 1868". 252) pl sexe 
fig. 66; Obs. XII, 1860, p. 12, pl. xxx, fig. 66.—KOoBELT, 
Icon., new ed., XVIII, 1912, p. 49, pl. pv, figs. 2663, 2664. 
Deshayes’ shell is a young specimen, which is straight on 
the base, but this figure agrees essentially with the shells of a 
considerable number of so-called species on the south shore 
and around the eastern-end of the Mediterranean. ‘There is 
some variation in dimensions and color but all agree well in 
the generally long, subrhomboid form, the sculpture, which is 
stronger anteriorly, the much broken and wide-spread beak 
sculpture, the teeth and the nacre. 
Var. kullethensis Lea. 
A little solider and more inflated than the typical U. durieut. 
The anterior end is greenish-yellow; the posterior end is cov- 
ered with almost coalescing green rays. 
Length 53, height 30, diam. 20 mm. 
Near Mardin in a tributary of the Tigris River. 
Unio kullethensis Lea, Pr. Acad. Nat. Sci. Phila., VIII, 1864, 
p. 285; jlsAcad. Nat. Sci..Phila WV i 1868) p25. ples 
fig. 65; Obs. XII, 18609, p. 11, pl. xxx, fig. 65.—KoBE rT, 
Icon., new ed., XVIII, 1912, p. 50, pl. pv, fig. 2665. 
Margaron (Unio) kullethensis Lea, Syn., 1870, p. 53. 
Unio kallethensis and kullinthensis Pavret, Conch. Sam., III, 
T890, p. 156. 
Unio durieui var. kullethensis, Stwpson, Syn., 1900, p. 695. 
