1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 385 
Unio parreyssi “v. d. Busch” Putuipri, 1848, ‘Abbild. Beschr. Conchyl.,’ III, 
p. 81, Unio, Pl. v, fig. 6=Unio parreissii Kiisrmr, 1848, in Martini and Chemnitz, 
‘Syst. Conch. Cab., IX, 2, Flussperlmuscheln,’ p. 268, Pl. xc, fig. 6. Sennar, White 
Nile. 
Nodularia parreyssi var. obliqua Lonestarr, 1914, Journ. Linn. Soc. London, 
Zool., XXXII, p. 255, Pl. xvi1t, fig. 11. Nile at Tawila, Masran Island, and Melut. 
Nodularia parreyssi var. elongata Lonestar, 1914, Journ. Linn. Soc. London, 
Zool., XXXII, p. 255, Pl. xvi11, figs. 9 and 10. Nile at Ad-Duwen, Tawila, and Gebel 
Ahmad Agha. 
Nodularia (Celatura) parreyssi var. pruneri “‘Bourguignat’’ Patuary, 1909, 
Mém. Inst. Egyptien, VI, p. 78. Based upon Unio xgyptiacus JicKELI, 1874, Nova 
Acta Ac. Nat. Cur. Dresden, XX XVII, 1, Pl. x, fig. 7 = Nodularia nilotica var. pruneri 
Smmpson, 1914, ‘ Descript. Cat. of Nitadee? p. 1021. Heypt. — 
Unio parreysst var. schweinfurtht E. v. Martens, 1876, ‘ Novit. Conchol., HEY, 
p. 140, Pl. cxxx11, figs. 3-5. Tonji River, Noudo Beyean Sudan. 
Celatura poirtert (A.'T. de Rochebrune). See p. 407. 
Celatura putzeyst (Preston). See p. 408. 
Celatura randabeli (Bourguignat). See p. 408. 
Unio ratidotus CHARMES, 1885, Bull. Soc. Malacol. France, II, p. 166 = Nodularia 
(?) ratidota Simpson, 1914, ‘Descript. Cat. Naiades,’ p. 1044. Nodularia radiota 
Simpson, 1900, Proc. U. 8. Nat. Mus., XXII, p. 824. Nodularia radiata Kosetct, 
1909, Abh. Senckenberg. Naturf. Ges., XXXII, p. 84. Kingani River, Tanganyika 
Territory. 
Parreysia regis Pilsbry and Bequaert. See p. 389. 
Unio (Grandidieria) rothschildt NEUVILLE AND ANTHONY, 1906, Bull. Mus. Hist. 
Nat. Paris, p. 409; 1906, Bull. Soc. Philomath. Paris, (9) VIII, p. 286, Pl. x11, figs. = 
Grandidieria rothschildi Stupson, 1914, ‘Descript. Cat. of Naiades,’ p. 1057. Lake 
Rudolf. This appears to be a Parreysia. 
Celatura (Levirostris) rotula Pilsbry and Bequaert. See p. 405. 
Reneus reneus JOUSSEAUME, 1886, Bull. Soc. Zool. France, XI, p. 482, Pl. x11, 
figs. 4a-b = Nodularia (Celatura) renea Simpson, 1914, ‘Descript. Cat. of Naiades,’ 
p. 1027. Niger River at Kayu (60 kilometers below Bamako). 
Unio ruellani Bourcuicnat, 1888, ‘Moll. Fluv. Nyanza Olen; ‘ 'p. 10,:.P1., 
figs. 16-18 = Parreysia ruellani Stupson, 1914, ‘Descript. Cat. of Naiades,’ p. 1128, 
Lake Victoria near the mouth of the Liwumbu River. 
Unio ruellani var. bayont GERMAIN, 1909, Bull. Mus. Hist. Nat. Paris, p. 275, 
Pl. 111, fig. 36=Parreysia ruellani var. bayont SIMPSON, 1914, ‘Descript. Cat. of 
Naindee p. 1128. Bugalla Islands, Lake Victoria. 
Unio rugifer Kisrrr, 1848, in Martini and Chemnitz, ‘Syst. Conch. Cab., IX, 2, 
Flussperlmuscheln,’ p. 157, Pl. saa figs. 3 and 4. Nile River, Egypt. 
Unio sennaariensis Ktstrer, 1848, in Martini and Chemnitz, ‘Syst. Conch. Cab., 
IX, 2, Flussperlmuscheln,’ p. 280, Pl. xcrv, figs. 5 and 6. Sennar. 
Unio silongweensis Preston, 1912, The Nautilus, XX VI, p. 385. Simpson, 1914, 
‘Descript. Cat. of Naiades,’ p. 726=Unio vicinus Preston, 1910, Ann. Mag. Nat. 
Hist., (8) VI, p. 60, Pl. rv, fig. 7 (not Unio vicinus I. Lea, 1856). Silongwe, Nyasa- 
land. Placed doubtfully in Unio by Simpson. 
Nodularia (Cxlatura) sobaensis Preston, 1914, Journ. Linn. Soc. London, Zool., 
XXXII, p. 266, Pl. xvutl, figs. 1-3. Blue Nile at Soba. 
