1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 451 
4Ktheria letowrneuxi BourGuiGnat, 1880-1881, ‘Matér. Moll. Acéph. Syst. 
Europ.,’ I, p. 55 (type locality: Nile River and canals of the Fayum). AnrTHony, 
1907, Ann. Soc. Zool. Malacol. Belgique, XLI, (1906), p. 364, Pl. x11, figs. 14 and 15 
(Bourguignat’s types). 
M4itheria chambardi Bourcuienat, 1880-1881, ‘Matér. Moll. Acéph. Syst. 
Europ.,’ I, p. 56 (type locality: in supposedly Pleistocene beds at Ramses, Lower 
Egypt). 
Aitheria nilotica ‘ Letourneux”’ Bourauienat, 1880-1881, op. cit., p. 58 (type 
locality: Nile in Nubia and Lake Mariout near Alexandria). 
Aitheria senegalica Bourauienat, 1880-1881, op. cit., p. 68 (based on Atheria 
semilunata WoopWaArD, 1854, ‘Manual of the Mollusca,’ p. 275, Pl. xvri1; fig. 7, from 
Senegal). , | 
itheria bourguignati A. 'T. pe RocHEBrune, 1886, Bull. Soc. Malacol. France, 
ITI, p. 14 (type locality: Gancini, on the right bank of the Congo River). A. T. pz 
ROcHEBRUNE AND GERMAIN, 1904, Mém. Soc. Zool. France, AVI, pot, PL ty fie: 8. 
Aitheria elliptica var. bourguignati A. T. de Rochebrune. DavurzENBERG AND 
GERMAIN, 1914, Rev. Zool. Afric., IV, 1, p. 67. | 
Aitheria tanganikana Boureuienat, 1889, Bull. Soc. Malacol. France, VI, p. 65 
(based solely upon the statement by E. A. Smith, 1880, Proc. Zool. Soc. London, 
p. 352, that of Htheria elliptica Lamarck “‘a single old, thick, dead specimen forms 
part of the collection”? made by Hore at Ujjiji). 
Aitheria nidus hirundinis Simrotu, 1890, Zool. Anzeiger, XIII, p. 662 (type 
locality: falls of the Congo River; no more accurate locality given, but the specimens 
having been collected by Pechuel-Loesche, probably came from the Cataract district 
in the Lower Congo). : | 7 
Aitheria heteromorpha Simrotu, 1894, Abh. Senckenberg. Naturf. Ges., XVIII, 
p. 287; to include mutation tubulifera, p. 288, Pl., figs. 1-7, and mutation nidus 
hirundinis, p. 288, Pl., figs. 8-10 (both from the falls of the Congo River). 
Aitheria heteromorpha mut. nidus hirundinis Simroth. WaacEn, 1905, Sitz. 
Ber. Ak. Wiss. Wien, Math. Naturw. K1., CXIV, Abt. 1, p. 162, Pl., figs. 1-5. 
Mitheria tubulosa “Bk.” Stwroru, 1894, Abh. Senckenberg. Naturf. Ges. 
XVIII, p. 277 (with description; type locality: Nile). 
The general distribution (Map 6) of this mussel appears to be: Nile 
system generally; Lake Tsana; Lake Stephanie!; Lake Victoria and 
its affluents; southeastward to the Wami (or Vuami) River (opposite 
Zanzibar Island)?; westward through the Chari-Chad basin and that of 
the Niger and Senegal (extreme northwestern locality: Brakna region, 
according to Germain, 1909); in West Africa southward to cover the 
entire Congo basin, and northern Angola (obtained in the Lucala River, 
an affluent of the Quanza River, by Welwitsch); also in northwestern 
1Dead valves obtained in that lake by A. Donaldson Smith are referable to the var. cailliaudi. 
2The Wami River is the farthest south given by v. Martens (1897, ‘Deutsch Ost Afr., IV, Beschalte 
Weichth.,’ p. 219). Germain (1909, Arch. Zool. Expér. Gén., XLI, p. 116, fig..55) maps the range of 
Etheria as covering the Zambezi basin and reaching a point somewhat farther south on the west coast, 
but without giving authorities for these limits. We ean find no record from farther south than the Wami 
River in East Africa. . 
