(594 PROCEEDINGS OF THE NATIONAL MUSEUM. 



UNIO PSEUDONYMUS Simpson.' 



*Unio liueii KOBELT, Icon., new scr.,.11, 1886, p. 22, pi. XLI, fig. 225. 

 Euphrates and Tigris rivers. 



t UNIO FERUSSACIANUS Lea. 



* T'nio ferusaacianus LEA, Jl. Acail. Nat. Sci. Phila., VI, 1868, p. 255. Footnote 



to description of 7'. emesaensis. 'LEA, Obs., XII, 1869, p. 15. Footnote. 

 *Margaron ( Unio) fernssacianus LKA, Syn., 1870, p. 46. 



Bagdad. 



UNIO EPISCOPALIS Tristram. 



*Unio episcopali* TI:ISTI:AM,- I'r. Zool. Soc. Lond., 1865, p. 54-1. VON MAIITEXS 

 Vorderas. Couch., 1874, p. 68. ^ WESTERLUND, Faun. Pal., II, Ft. 7, 1890, p. 

 (!2. *P.KTEL. Conch. Sam., Ill, 1890, p. 151. * KOBETT, Icon., VI, new ser., 

 1893, p. 89, pi. CLXXV, fig. 1119. 



Oroiites Elver, Syria. 



tUNIO DURIEUI Deshayes. 



T/nto durieui DESHAYES, Hist. Nat. Moll. Alg. Atlas, 1847, pi. cix, figs. 5-8. 3 

 BOUKGUIGNAT, Mol. Alg., II, 1864, p. 288, pi. xix, figs. 4-8. * WESTERLUND. 

 Faun. Pal., II, Pt. 7, 1890, p. 142." P.KTEL, Conch. Sam., Ill, 1890, p. 151. 



*Margaron ( Unio) durieui LEA, Syn., 1852, p. 39; 1870, p. 48. 



* Unio sitifenais MOKELET, Jl. de Conch., II, 1851, p. 360. 

 I'nio orientaJis BOUKGUIGNAT, Test. Noviss., 1852, p. 29. 



*Unio brui/uieriuHiia BOURGUIGNAT, Cat. Rais., 1853, p. 78, pi. n, figs. 54-58. 



*WESTERLUND, Faun. Pal., II, Pt. 7, 1890, p. 172. * P.KTEL, C. Sam., Ill, 



1890, p. 146. 



*Margaron ( Unio) brugnierianus LEA, Syn., 1870, p. 44. 

 "Unto vescoi BOURGUIGNAT, Rev. et. Mag, VIII, 1856, p. 74, pi. u, figs. 4-8. 4 



* KOBELT, Icon., IV, 1876, p. 66, pi. cxix, fig. 1154. *WESTEULUN , Faun. 



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

 *Maryaron ( Unio) vescoi LEA, Syn., 1870, p. 46. 



* Unio acinverzenbachi BOURGUIGNAT, Rev. ct Mag., VIII., 1856, p. 75, pl.vin, figs. 



1-5. *KUSTER, Conch. Cab. Unio, 1862, p. 266, pi. xc, fig. 2. * SOWEKBY, 

 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 Boi'RGUiGNAT, Rev. et Mag., VIII, 1856, p. 76, pi. m, iigs. 1-4. 

 *Unio damaacensia LEA/' Proc. Acad. Nat. Sci. Phila., VII, 1863. p. 190; Jl. Acad. 



1 Kobelt supposed this to be the U. Jiueti 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 docs 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 silicate form, 

 shaped like batarua, but more compressed and having a beautiful purple nacre. 



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

 Syrian shells, which I have referred to this species. 



4 Bourguiguat says he has received numerous specimens of this from Dronet, labeled 

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

 published, and have therefore no scientific standing. 



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

 durieui. 



