694 PROCEEDINGS OF THE NATIONAL MUSEUM. 



UNIO PSEUDONYMUS Simpson.' 

 ^Unio hueti Kobklt, Icon., new ser., II, 1886, p. 22, pi. xli, fig. 225. 



Euphrates and Tigris rivers. 



t UNIO FERUSSACIANUS Lea. 



*Unio ferussacianus Lea, Jl. Acad. Nat. Sci. Pliila., VI, 1868, p. 255. Footnote 



to description of I^. emesaeiists. — ' Lea, Obs., XII, 1869, p. 15. Footnote. 

 *Margaron ( Unio) ferussacianus Lea, Syn., 1870, ji. 46. 



Bagdad. 



UNIO EPISCOPALIS Tristram. 



*Unio episcopalis Tristram,'- Pr. Zool. Soc. Loud., 1865, p. 544. — von Martens 

 Vorderas. Couch., 1874, p. 68.— *Westerlund, Faun. Pal., II, Pt. 7, 1890, p. 

 62. — *P.ETEL. Conch. Sam., Ill, 1890, p. 151.— * Kobett, Icon., VI, new ser., 

 1893, p. 89, pT. CLXXV, tig. 1119. 



Orontes Eiver, Syria. 



tUNIO DURIEUI Deshayes. 



*Unio durieui Deshayes, Hist. Nat. Moll. Alg. Atlas, 1847, pi. cix, figs. 5-8.^ — 

 Bourguignat; Mol. Alg., II, 1864, p. 288, pi. xix, figs. 4-8. — " Westerlund, 

 Faun. Pal., II, Pt. 7, 1890, p. 142.—* PiETEL, Conch. Sam., Ill, 1890, p. 151. 



*Margaron {Unio) durlevilj^x, Syn., 1852, p. 39; 1870, p. 48. 



* Unio sitifensis Morelet, Jl. de Conch., II, 1851, p. 360. 

 Unio orientalis Bourguignat, Test. Noviss., 1852, p. 29. 



*Z7mio hriiguieriamis Bourguignat, Cat. Eais., 1853, p. 78, pi. ii, figs. 54-58. — 

 *Westerlund, Faun. Pal., II, Pt. 7, 1890, p. 172.— * P.etel, C. Sam., Ill, 

 1890, p. 146. 



*Margaron ( Unio) irugmerianus Lea, Syn., 1870, p. 44. 



* Unio vescoi Bourguignat, Eev. et. Mag., VIII, 1856, p. 74, pi. ii, figs. 4-8.-' — 



*KOBELT, Icon., IV, 1876, p. 66, pi. cxix, fig. 1154.— *Westerlun -, Faun. 

 Pal., II, Pt. 7, 1890, p. 152.— *P^TEL, Conch. Sam., Ill, 1890, p. 171. 

 *Margaron {Unio) vescoi Lea, Syn., 1870, p. 46. 



* Unio schwerzenhaclii Bourguignat, Eev. ct Mag., VIII., 1856, p. 75, pl.viii, figs. 



1-5.— *KUSTER, Conch. Cab. Unio, 1802, p. 266, pi. xc, fig. 2.— * Sowei;by, 

 Conch. Icon., XVI, 1868, pi. XLiv, fig. 241.— *Kobelt, Icon , VII, 1880, p. 81, 

 pi. ccvi, fig. 2099.—* Westerlund, Faun. Pal., II, Pt. 7, 1890, p. 95. 



/ Unio prusii Bourguignat, Eev. et Mag., VIII, 1856, p. 76, \A. iii, figs. 1-4. 



^Unio damascensis hiEA,^ Proc. Acad. Nat. Sci. Phila., VII, 1863, p. 190; Jl. Acad. 



1 Kobelt supposed this to be the Z7. hueti of Bourguignat, and figured and described 

 it for that species. It is, however, very distinct, and I therefore am compelled to 

 give it a new name. 



^Tristram only describes this in Latin, and does not figure it; and as I have never 

 seen an authentic specimen I am obliged to depend on Kobelt's figure, which agrees 

 well with Tristram's diagnosis. These make it a large, somewhat sulcate form, 

 shaped like haiavus, but more compressed and having a beautiful jnirple uacre. 



3 There does not seem to be any essential difference between the Algerian and the 

 Syrian shells, which I have referred to this species. 



■* Bourguignat says he has received numerous specimens of this from Drouet, labeled 

 U. turcicus Parreyss, but Parreyss's names were only in manuscript, and were never 

 published, and have therefore no scientific standing. 



"'Only the type is in the Lea collection, and it appears to be a delicate specimen of 

 diiricui. 



